unmanly

adjectives

not possessing qualities befitting a man
unmanful, unmanlike, unmanly
is derived from
unmanliness
antonym
manly
lacking in courage and manly strength and resolution; contemptibly fearful
poor-spirited, pusillanimous, unmanly
is derived from
unmanliness

adverbs

without qualities thought to befit a man
unmanfully, unmanly