also: こじゅうとめ
noun
sister-in-law (husband's sister)
Specifically refers to one's husband's sister. In traditional contexts, can carry a nuance of a critical or meddlesome in-law, but the basic meaning is simply the familial relationship.
私の小姑はとても親切です。
My sister-in-law (husband's sister) is very kind.
小姑と一緒に買い物に行った。
I went shopping with my sister-in-law (husband's sister).
Kana spelling; may be used for clarity or in casual writing.
Alternate reading with the same meaning; slightly more colloquial or feminine.
Compound of 小 (ko, 'small' or 'young') and 姑 (shūto, 'parent-in-law'). The term originally referred to a younger female relative of one's spouse, later narrowing to 'husband's sister'.