遠慮気味 - JP-EN Jisho

遠(えん)慮(りょ)気(ぎ)味(み)

noun (common) (futsuumeishi)adjectival nouns or quasi-adjectives (keiyodoshi)nouns which may take the genitive case particle 'no'

somewhat reserved (diffident); shyly; timidly; retiringly; in a retiring (reserved) manner