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sister-in-law▼(wife's sister)noun[UK: ˈsɪ.stə.rɪn.ˌlɔː] [US: ˈsɪ.stə.rɪn.ˌlɔːr]
co-brother-in-law▼(one's spouse's brother-in-law)noun
co-sister-in-law▼(one's husband's brother's wife)noun
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