形容詞 unmanly:

1. not possessing qualities befitting a man
   同義詞：unmanful, unmanlike
2. lacking in courage and manly strength and resolution; contemptibly fearful
   同義詞：pusillanimous, poor-spirited

副詞 unmanly:

1. without qualities thought to befit a man
   同義詞：unmanfully

1. It was once thought unmanly not to drink and smoke.
   身為男子不抽煙不喝酒曾視為無男子氣概。