taciturn, unassertive, imperturbable, phlegmatic, timid, introverted, stoical, pugnacious, undemonstrative, guileless, genial, reticent, sphinxlike, amiable, laconic, stoic, extrovert, pensive, voluble, morose, sheepish, callow, garrulous, stolid, unforthcoming, disdainful, avuncular, incommunicative, owlish, bookish, dutiful, urbane, inexpressive, sullen, impish, scatty, supercilious, bumptious, timorous, nonchalant, inarticulate, saturnine, gawky, nerdish, clubbable, standoffish, impetuous, affable, cocksure, snappish, jocular, studious, bashful, waspish, gruff, puppyish, maladroit, dour, talkative, unshowy, debonair, unexpressive, unassuming, gregarious, unexcitable, schoolboyish, straightlaced, obsequious, dandyish, equanimous, eccentric, unruffled, inscrutable, affectless, decorous, insouciant, boyish, introspective, querulous, goatish, suave, schoolmarmish, obdurate, conceited, unprepossessing, tetchy, impassive, peevish, caddish, epicene, assertive, orotund, dandified, schoolmasterly, foppish, ebullient, inquisitive, unflappable, discomfited, loquacious, dapper, cocky, believe, destitute, stable, admits, agreeable, ancient, approving, arbitrary, arid, articulate, be, central, chargeable, commercial, common, complex, compulsory, concern, confess, conforms, hesitant, shy, ingenuous, despondent, impatient, irresolute, dejected, carefree, meek, sprightly, surly, truculent, arrogant, confident

diffidently

reserved, shy, timid, unconfident, unsure