undemonstrative

adj not in the habit of showing strong feelings; reserved 不习惯表露强烈感情的; 喜怒不形於色的.

uncovered, uncritical, uncritically, uncrossed, uncrowned, uncrumpled, UNCTAD, unction, unctuous, unctuously, unctuousness (also unction), uncurl, uncut, undaunted, undeceive, undecided, undeclared, undefended, undefined, undemanding, undeniable, undeniably, under, under arms, under control, under the charge of, under the heel of, under the order of, under way, under-, under-secretary, under-sexed, under-side, underachieve, underachiever, underact, underarm, underbelly, underbid, underbrush,