sister-in-law/'sɪstərɪnlɔː $ -lɑː/

n. the sister of a person's husband or wife

n. [C] 嫂子；弟媳；（大或小）姨子；（大或小）姑子：Nancy got on well with her sister-in-law. 南希和她姑子的关系不错。

常犯错误

✗ two sister-in-laws

✓ two sisters-in-law 两个嫂子