spontaneous Meaning and Definition
1. a. happening or arising without apparent external cause
2. s. said or done without having been planned or written in advance
Synonyms ad-lib automatic break loose casual cold turkey down extemporaneous extempore free free spirited impetuous impromptu improvised inevitable instinctive involuntary irresistible natural offhand simple unartful unavoidable unbidden uncompelled unconscious unconstrained uncontrived uncontrolled unforced unintentional unplanned unpremeditated unprompted unsophisticated unstudied up front voluntary willing
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