妹いもうと Common Noun English jmdict 1 noun (common) (futsuumeishi) younger sister あのかわいい少女は私の妹です。 That pretty girl is my sister.
妹いも Noun English jmdict 1 noun (common) (futsuumeishi) archaic familiar language darling (woman);dear;honey;my betrothed 2 noun (common) (futsuumeishi) archaic one's sister 3 noun (common) (futsuumeishi) archaic familiar language female term or language friend
妹さんいもうとさん Noun English jmdict 1 noun (common) (futsuumeishi) honorific or respectful (sonkeigo) language younger sister 妹さんが手術後危機を脱したそうで、よかったですね。 I'm glad to hear that your sister is out of danger after her operation.