cowardly

Synonyms: afraid anxious apprehensive backward base caitiff chickenhearted cowering cowhearted craven dastardly diffident dismayed fainthearted frightened gutless having the willies jittery lacking courage lily-livered nervous no guts panicky paper tiger pigeonhearted pusillanimous recreant retiring running scared scared shrinking shy soft spineless timid timorous weak weak-kneed worthless yellow yellow-bellied

Antonyms: bold brave courageous daring dauntless unafraid undaunted unfearful