adjective

feeling or showing fear or anxiety.

they are fearful of the threat of nuclear war

afraid,frightened,scared,scared stiff,scared to death,terrified,petrified,alarmed,panicky,nervous,tense,apprehensive,uneasy,hesitant,disquieted,worried,worried sick,anxious,nervy,jittery,jumpy,in a (blue) funk,frit,afeared,affrighted,trembling,quaking,quivering,shrinking,cowering,cowed,daunted,timid,timorous,diffident,faint-hearted,cowardly,pusillanimous,twitchy,keyed up,yellow,chicken,in a cold sweat,a bundle of nerves,like a cat on a hot tin roof,frightened of one’s own shadow,having kittens,like a cat on hot bricks,windy,stressy,spooked,spooky,antsy,overstrung,unquiet