3. opportunity, opportune or suitable time or place, season, stage, right set of circumstances, contingency; chance, opening, golden opportunity, once-in-a-lifetime chance, turn, Inf. shot, SI. crack.
4. reason, reason why, why and wherefore, the why, the wherefore, Inf. the what for, rationale, explanation, excuse, basis, ground, justification, warrant; motive, motivation, inspiration, inducement, incentive, incitement, stimulus, impulse, provocation; cause, determinant, determining factor, origin, source, root, fountainhead, mainspring, derivation.
5. on occasion, now and then, once in a while, sometimes. See - occasionally.
-v. 6. give an opportunity or chance or opening for, call for, demand, raise a need for, make necessary; motivate, prompt, bring about, bring on, induce, bring forth or out, bring to pass, elicit, give rise to, effect, cause, provoke; generate, breed, engender, beget, give birth to, produce, make, create; start, originate, begin, set up, establish, build.
occasional, adj. 1. chance, irregular, intermittent, periodic; random, sporadic, fitful, erratic; infrequent, unfrequent, unhabitual, uncustomary, uncommon, unusual, unwonted, exceptional; rare, seldom seen or met, seldom, scarce.
2. supplementary, supplemental, auxiliary, accessory, additional, added, annexed, multipurpose; extra, spare, surplus, nonessential, extraneous; provisional, part-time, temporary, non-permanent; incidental, odd, casual, scattered or sprinkled here and there or about, spread around.
3. purposive, special, prepared for the occasion or event; commissioned, solicited, requested, asked for; commemorative, memorial, in honor of [s.o.]; holiday, ceremonial, festive, celebratory; inspirational, inspired, extemporaneous, extemporary, extempore, impromptu, SI. made, off the cuff.
4. causative, causal, effecting, effectuating, eliciting; motivating, influential, prompting, provocative, impelling, impulsive, propulsive, driving; germinal, seminal, beginning, starting.
occasionally, adv. at time, from time to time, now and then, every now and then, every now and again, now and again, on occasion, here and there, once in a while, sometimes, Rare, sometime; when one has a chance, when one feels like it, when one is up to it or gets to it; periodically, at intervals, intermittently, off and on, sporadically, irregularly, by or in snatches or fits and starts; infrequently, rarely, seldom, once in a blue moon or a coon's age, hardly ever.
occlude, v. close, shut, seal; shut off, close off, stop; stop up, plug up, cork, oppilate, dam up; fill, choke, clog, block, obstruct, Mach. throttle; bar, barricade, impede, trammel, Law. estop; shut in, enclose, hedge in, hem in; prohibit, prevent, foreclose, shut out, debar.
occult, adj. 1. mysterious, arcane, inexplicable, unexplainable, inexplainable, unaccountable, insoluble, insolvable, unsolvable, Obs. inextricable; puzzling, enigmatic, baffling, bewildering, confounding, perplexing, mystifying; impenetrable, incomprehensible, inapprehensible, past or beyond comprehension or understanding, unknowable, incognizable, incognosci-ble, inscrutable, unfathomable, indecipherable, undecipherable, undiscoverable; transcendental, mystical, mystic, supernatural, preternatural.
2. secret, cryptic, perdu, private; concealed, hidden, veiled, shrouded, enshrouded; obscure, obscured, dim, vague, shadowy, cloudy, nebulous.
-n. 3. occultism, cabalism, mysticism, esoterism, esotericism, esotery, hermetics, hermeticism; supernaturalism, transcendentalism.
4. the supernatural, the supersensible; mystery, puzzle, enigma, question, question mark; secret, cabala, esoterica, arcanum, closed or sealed book; unknowable, deep or profound mystery, mystery of mysteries. -v. 5. cover, cover up, conceal, hide, veil, mask, screen; eclipse, block; cloud, obscure; shroud, enshroud.