mother-in-law apartment
US /ˈmʌð.ər.ɪn.lɔː ˌəˈpɑːrt.mənt/
UK /ˈmʌð.ər.ɪn.lɔː ˌəˈpɑːrt.mənt/

1.
apartamento para suegra, apartamento anexo
a separate living space within a single-family home, typically designed for an elderly parent or other family member, often with its own entrance, kitchen, and bathroom
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They added a mother-in-law apartment to their house for her aging parents.
Añadieron un apartamento para suegra a su casa para sus padres ancianos.
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A mother-in-law apartment can provide privacy and independence for extended family members.
Un apartamento para suegra puede proporcionar privacidad e independencia a los miembros de la familia extendida.