Synonyms of close-mouthed

1 Syllable
whist, still, quiet
2 Syllables
silent, quieter, quieted, speechless, stilling, dried-up, stillest, stiller, quieting, stilled, quietest, whister
3 Syllables
tightlipped, reserved, soft-spoken, reticent, taciturn, softspoken
4 Syllables
secretive, unforthcoming, self-controlled, self-restrained, introverted
5 Syllables
inobtrusive, unexpressive, untalkative
6 Syllables
uncompanionable, incommunicable, uncommunicable
7 Syllables
uncommunicative, incommunicative