flac·cid
adjective/ˈflæsɪd/
/ˈflæsɪd/
(formal)- soft and weak; not hard
软弱的；松弛的；不结实的 - flaccid breasts
松弛的乳房
Oxford Collocations DictionaryFlaccid is used with these nouns:- penis
Word Originearly 17th cent.: from French flaccide or Latin flaccidus, from flaccus ‘flabby’. - flaccid breasts