schüchtern — meaning in English

English meaning

awkward adj Causing or feeling embarrassment or discomfort, especially in a social situation.
bashful adjective Shy and easily embarrassed, especially around other people.
coy adjective Shy or modest, especially in a deliberately playful or teasing way.
diffident adj Reluctant to trust other people.
shy adj Nervous or uncomfortable around other people; reluctant to draw attention to oneself.
timid adj Easily frightened or lacking confidence, especially in unfamiliar situations.

schüchtern is used for these senses in English:

bashful Shy; not liking to be noticed; socially timid.
coy (archaic) Quiet, reserved, modest.
diffident (archaic) Lacking confidence in others; distrustful.
diffidently In a diffident manner; without confidence in oneself.
fainthearted Faint of heart; irresolute; fearful.
self-effacing Shy, extremely humble and modest; making oneself seem unnoticeable.
shy Easily frightened; timid.
shy Reserved; disinclined to familiar approach.

adj Causing or feeling embarrassment or discomfort, especially in a social situation.
adj Clumsy or lacking skill in movement or use of the hands.
adj Difficult to deal with or handle.