
When referring to someone's brother-in-law, it is common to use the hyphenated term brother-in-law rather than the separate words brother in law. The hyphen is used to link the relationship term and can also be seen in words like sister-in-law, mother-in-law, and father-in-law. While the usage of hyphens has been flexible and constantly evolving, it is generally recommended to refer to a dictionary or online resource for the latest usage guidelines. Additionally, the hyphenation rules can vary between American and British English. In terms of capitalization, brother-in-law is typically written in lower case unless it appears at the beginning of a sentence or in a context where capitalization is required.
| Characteristics | Values |
|---|---|
| Hyphenated | Yes |
| Capitalized | No |
| Plural | Brothers-in-law |
| Singular | Brother-in-law |
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What You'll Learn

'Brother-in-law' is hyphenated
The term "brother-in-law" is hyphenated. This is because it is a compound noun, with in-law describing the brother. The hyphen is used to 'glue' the two words together to make a new word. The term "brother-in-law" refers to the brother of one's spouse, the husband of one's sibling, or the husband of one's spouse's sibling.
When referring to multiple brothers who are all related by marriage, the correct term is "brothers-in-law". This is because the pluralization is typical when the noun precedes the adjective in a phrase or title. The hyphen is still used because the word "brothers" is plural, not "laws".
It is important to note that the term "brother-in-law" is not typically capitalized unless it appears at the beginning of a sentence or in a title. For example, "I introduced my Brother-in-law to the rest of the family".
Some examples of "brother-in-law" being used in a sentence include: "He looked at his brother-in-law for a minute" and "Cuomo spoke with Islam’s wife and brother-in-law over the phone". These examples demonstrate the hyphenated form of the term and how it is only capitalized when necessary.
In summary, the term "brother-in-law" is hyphenated to indicate that it is a compound noun, and it is only capitalized when standard capitalization rules apply.
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It is not capitalised
The term "brother-in-law" is not typically capitalised in English. It is a noun that refers to the brother of one's spouse, the husband of one's sibling, or the husband of one's spouse's sibling. For example, "My brother-in-law is coming to visit us next week." Here, "brother-in-law" is used as a noun describing a family relation, and it is not capitalised.
The hyphen in "brother-in-law" serves to glue together the words "brother" and "in-law", creating a compound noun. This hyphenation is necessary because the compound noun "brother-in-law" has a different meaning from the individual words "brother" and "in-law". The hyphen also helps with pronunciation and clarity, as it can be confusing to read as separate words.
Additionally, the plural form of "brother-in-law" is "brothers-in-law". The hyphen remains in the plural form because it is still functioning as a compound noun. For example, "My two brothers-in-law are very supportive." Here, the hyphenated form "brothers-in-law" is used to maintain the clarity and compound nature of the phrase.
It is worth noting that the capitalisation of "brother-in-law" may vary in different styles or contexts. While it is generally not capitalised in standard English usage, there may be specific situations or style guides that dictate otherwise. For example, in certain formal or official documents, capitalisation rules might differ. However, in everyday writing and conversation, "brother-in-law" is typically lowercase.
In summary, the term "brother-in-law" is typically hyphenated as brother-in-law or brothers-in-law in its plural form. The hyphenation is important for both grammatical and pronunciation reasons. However, the term is generally not capitalised unless specific style guides or formal contexts dictate otherwise.
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It describes the brother of one's spouse
The term "brother-in-law" is hyphenated and is used to describe the brother of one's spouse, the husband of one's sibling, or the husband of one's spouse's sibling. It is typically used to refer to a male relative by marriage, rather than by blood. For example, the brother of your spouse is your brother-in-law, and the husband of your sibling is also your brother-in-law. Similarly, the term can be used in plural form as "brothers-in-law" to refer to multiple brothers of one's spouse or siblings' husbands.
Hyphenating the term "brother-in-law" is the standard practice in English grammar. The hyphen serves as a "glue" to combine the words "brother" and "in-law" into a single compound word. This hyphenation is consistent across various sources and style guides.
It is worth noting that the hyphenation of "brother-in-law" is not mandatory in all cases. When the phrase is used as an adjective, describing someone as a "brother-in-law," the hyphen may be omitted, although this usage is less common. However, when used as a noun, as in "my brother-in-law," the hyphen is typically retained.
The capitalization of "brother-in-law" depends on its usage in a sentence. When used as a proper noun or at the beginning of a sentence, it is capitalized as "Brother-in-law." For example, "I introduced my Brother-in-law to the team." However, when used as a common noun within a sentence, it is lowercase as in "I have a great brother-in-law."
In summary, the term "brother-in-law" is hyphenated to indicate the relationship between two people who are brothers by marriage or affinity, rather than by blood. The hyphenation is standard, but the capitalization varies depending on the context of its usage in a sentence. Understanding the correct usage of "brother-in-law" is essential for clear communication and adhering to grammatical conventions.
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It can be used in the plural form: 'brothers-in-law'
When referring to multiple brothers who are related by marriage, the correct term is "brothers-in-law". This term is hyphenated because it is one unit, with “in-law” describing the brothers. The hyphenated form is used in the plural because what you have more than one of is "brothers", not "laws".
The term "brothers-in-law" can be used to describe the brothers of one's spouse, the husbands of one's siblings, or the husbands of one's spouse's siblings. For example, if you have two brothers married to two of your sisters, you would refer to those brothers as your "brothers-in-law". Similarly, if your spouse has two brothers, they would be your "brothers-in-law".
The hyphenated form is also used in compound adjectives, where the relationship is used to describe someone or something. For example, "I went on vacation with my brother-in-law." Here, the relationship is used to describe the person, and the hyphenated form is appropriate.
It is worth noting that the plural form "brothers-in-law" is not commonly used in English. However, the pluralization is typical when the noun precedes the adjective in a phrase or title. Additionally, some sources suggest that the term can be written without a hyphen, as in "brothers in law".
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It can be used to describe the husband of one's sibling
The term "brother-in-law" is used to refer to the husband of one's sibling or the brother of one's spouse. When used in this context, it is typically hyphenated as a single compound word, with the prefix "in-" joined to "law" with a hyphen. This is because it functions as one unit of meaning and is a compound noun. The hyphen also helps with pronunciation.
The term can be pluralised to "brothers-in-law" when referring to multiple individuals who meet the above criteria. This is the typical pluralisation when the noun precedes the adjective in a phrase or title. For example, one might refer to "my brothers-in-law" or "his brothers-in-law".
The term "brother-in-law" is not typically capitalised unless it begins a sentence or is used in a title or headline, following standard English capitalisation rules. For example, "My brother-in-law is coming to visit" or "The Brother-in-Law's Dilemma: A New Perspective".
It is worth noting that the hyphen is not always necessary and some style guides may omit it, resulting in "brother in law" or "brothers in law". However, this is less common and may be considered incorrect by some. Ultimately, the presence or absence of the hyphen does not change the meaning of the phrase.
In summary, "brother-in-law" is the standard spelling when referring to the husband of one's sibling, with "brothers-in-law" being the plural form. The term is hyphenated as it is a compound word, but it is not typically capitalised outside of standard capitalisation rules.
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Frequently asked questions
Yes, "brother-in-law" is hyphenated.
No, "brother-in-law" is not capitalized unless it begins a sentence.
Yes, the plural form of "brother-in-law" is "brothers-in-law" and it is also hyphenated.











































