not having, not showing, much belief in one's own abilities

hesitant; unconfident

full of, feeling, expressing, envy

jealous, resentful

not believing; showing doubt

unbelieving

(of a person) self-conscious and uncomfortable in the presence of others; (of animals etc) easily frightened

quiet and self-conscious

not confident; not certain or reliable

doubtful, insecure

careful about possible danger or trouble

careful, cautious