to be timid―pusillanimous―chicken-hearted
気が小さい - 斎藤和英大辞典
to be faint-hearted―chicken-hearted―timid―timorous―nervous
気が弱い - 斎藤和英大辞典
to betimid 性格などがいじける - EDR日英対訳辞書
of human personality, to betimid or cowardly
小心である属性 - EDR日英対訳辞書
to be seized with fear―overcome with fright―frightened―struck with awe―awed―seized with a panic―to become timid―become nervous―get into a funk
怖気がつく - 斎藤和英大辞典
Amaterasu and Takamimusubi urged Amenouzume on, saying "You should ask him who he is, because even though you may be a weak woman, you never grow timid when meeting others," so she asked him his name.
アマテラスとタカミムスビに、「手弱女だが顔を合わせても気後れしない(面勝つ)からあなたが問いなさい」と言われたアメノウズメが名を問い質すた。 - Wikipedia日英京都関連文書対訳コーパス