ifi (waifi)NG11sister wifeAmonera wivu ifi ye.She feels jealousy for her sister wife.Amdira wivu ifi ye.She eats (= has) jealousy for her sister wife.Ni ifi wangu.She's my sister wife.The wives of the same husband address each other with ifi.2sister-in-lawIfi ywungu keza.My sister-in-law has come.This an address term for husband's sister or wife of husband's brother.