We have discussed basic synonyms and their use in our daily routine conversational sentences. It goes back to Old English and it’s germanic roots. So it’s a survivor of an older sentence structure to pluralize ‘Brother in law’ to ‘brothers in law’. Of course the ‘s possessive is a much later addition to the language. Those guys on the beach in Normandy waiting for William the Duke of Normandy’s army would have said “the army of Duke William” and “the restaurant of my brothers in law”. However this old construct has survived the ‘technically’ correct form for the posessive is indeed “brothers in law’s”.

This debate seems to rely on a couple of printed authorities , but this construction is so low frequency that most grammars donʼt have any information on it. Few native speakers ever need to use it, so intuitions are hard to access. I have done some preliminary research and found that when in-laws becomes possessive, brothers-in-law is written brother-in-law’s.

The focus should fall on the word nearest the object. The word in the example sentence does not match the entry word. On her 59-day trek she was accompanied by two older sisters-in-law and another female friend, none of whom could drive a car. This study offers some insights into what happens to relationships with relatives such as brothers- and sisters-in-law, particularly once one or more of the linkage people have died. The plural sister-in-laws is occasionally seen, especially in American English, but this is considered incorrect by most sources; see, for example, . The same is true for other hyphenated nouns such as doctors-in-residence, attorneys-at-law, and fathers-in-law.

Earlier on, he may have been prepared to deliver his sisters-in-law to his sworn brother with their chastity intact. This revelation throws a completely different light on his ostentatious loyalty to his brother and propriety towards his sisters-in-law. This shows grade level based on the word’s complexity. Bring vs. Take Both words imply motion, but the difference may b…

So, I would conclude that we should rewrite sentences 1 and 2 in the same way, as follows. Your spouse’s female siblings are not 4500 characters to words your sister-in-laws, but your sisters-in-law. The same pattern applies to brothers-in-law, fathers-in-law, and mothers-in-law.

If the compound noun is plural, form the plural first and then use the apostrophe. A compound noun is that which has multiple terms in it. The most common combinations for compound nouns are [may be a noun + noun] and [could be an adjective + noun], but note that there are others. We tend not to non-standard plurals (e.g. two brother-in-laws, two attorney generals).

The Rajasthan Subordinate and Ministerial Services Selection Board has released the additional Rajasthan Patwari Final Result for the recruitment cycle 2021. A total of 94 candidates are selected for the Patwari Recruitment 2021. The RSMSSB is soon going to release a new notification for Rajasthan Patwari Recruitment 2022. The selection of the candidates depends on two rounds – A written Exam and a Personal Interview.

This would suggest that written constructions are rare, and I would question the authority of these pages – are they more pages that cite native-speaker intuition as their source? An ngrams search is a much better representation (which, incidentally, finds brother-in-laws’s to be more common). As you rightly state, however, these corpora generally only index written language – spoken language is another matter.