frightened

fearful

shy (the usual word)

shy

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

hesitant; unconfident

showing that one is inferior, less able etc

meek, unassuming

(especially of hair having a dull brown colour; (of a person) timid, shy

drab; quiet

of the nerves; easily afraid, timid

anxious, fearful

awkwardly self-conscious; (feeling) foolish or embarrassed because of having done something wrong

shy, embarrassed

easily frightened

shy

not trustful

nervous

(of a person) unusually quiet and shy

unsociable