impulsionn.
英 ɪm'pʌlʃ(ə)n | 美 ɪm'pʌlʃən
中文n. 冲动；冲击；原动力
词根词源
impulsion (n.)early 15c., "driving, pushing, thrusting," from Old French impulsion (early 14c.), from Latin impulsionem (nominative impulsio) "external pressure," figuratively "incitement, instigation," noun of action from past participle stem of impellere (see impel).
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