mild-mannered vs mild

mild-mannered and mild both are adjectives.

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

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