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sister–in–law

sister–in–law /ˈsɪstɚrənˌlɑː/ noun
plural sisters–in–law /ˈsɪstɚzənˌlɑ/
sister–in–law
/ˈsɪstɚrənˌlɑː/
noun
plural sisters–in–law /ˈsɪstɚzənˌlɑ/
Britannica Dictionary definition of SISTER–IN–LAW
[count]
1 
: the sister of your husband or wife
2 
: the wife of your brother