1. Definition: 1. lacking or indicating lack of confidence or assurance; "uncertain of his convictions"; "unsure of himself and his future"; "moving with uncertain (or unsure) steps"; "an uncertain smile"; "touched the ornaments with uncertain fingers"

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1. Definition: 1. (used of a device) designed so that a property (as e.g. light) can be varied; "a variable capacitor"; "variable filters in front of the mercury xenon lights"

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1. Definition: 1. determined by chance or impulse or whim rather than by necessity or reason; "a capricious refusal"; "authoritarian rulers are frequently capricious"; "the victim of whimsical persecutions"

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1. Definition: 1. ambiguous (especially in the negative); "she spoke in no uncertain terms"

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1. Definition: 1. not to be accounted for or explained; "perceptible only as unaccountable influences that hinder progress"; "an unexplainable fear"

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1. Definition: 1. not occurring at expected times

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