c.p.a. (noun) certified public accountant: state-certified accountant
Sinonime: buttoned up, clammed up, close, close-mouthed, could hear a pin drop, dumb, hushed, hushful, inaudible, low, low-pitched, muffled, mute, muted, noiseless, not saying boo, peaceful, quiescent, quieted, reserved,
restrained, reticent, secretive, silent, soft, soundless, speechless, still, stilled,
subdued, taciturn,
tasteful, tight-lipped, uncommunicative, unexpressed,
unobtrusive, unspeaking, unuttered, whist