mild vs mild-mannered

mild and mild-mannered both are adjectives.

Word	Noun	Adjective	Verb	Adverb
mild	No	Yes	No	No
mild-mannered	No	Yes	No	No

mild (adjective)	mild-mannered (adjective)
moderate in type or degree or effect or force; far from extreme	behaving in or having a mild or gentle manner
mild and pleasant
humble in spirit or manner; suggesting retiring mildness or even cowed submissiveness