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spon·ta·ne·ous

spontaneous

 
 
pronunciation:
span teI ni s
features:
Word Combinations (adjective)
part of speech: adjective
definition 1: happening freely or done by impulse; not forced.
She reacted to news of the disaster with spontaneous generosity.His smile in the photograph doesn't appear spontaneous.The anti-government demonstration had not been planned, but, rather, was an unpredicted, spontaneous event.
synonyms:
impulsive, natural, unpremeditated, voluntary
antonyms:
calculated, constrained, planned, premeditated, prepared
similar words:
ad-lib, candid, extemporaneous, free, impetuous, impromptu, seat-of-the-pants, snap, unforced, unprompted
definition 2: happening without outward forces or causes.
spontaneous regeneration of tissue
similar words:
automatic, ex nihilo, natural, self-acting
definition 3: free, natural, and unconstrained in behavior.
synonyms:
free, natural, unconstrained
antonyms:
constrained, inhibited
similar words:
abandoned, extemporaneous, ingenuous, open, unaffected, unguarded, unstudied, willing
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derivations: spontaneously (adv.), spontaneousness (n.)