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experience [experience 词源字典]: experience: [14] Experience, experiment [14], and expert [14] all come from the same source, Latin experīrī. This was a compound verb formed from the prefix ex- ‘out’ and a prehistoric base *per- denoting ‘attempt, trial’ (found also in English empirical, peril, pirate, and repertory), and meant ‘try, test’. The original meaning is best preserved in experiment, but in fact experience too meant at first ‘putting to the test’ in English.

From this developed the notion of ‘actually observing phenomena in order to gain knowledge of them’, which in turn led to the more subjective ‘condition of having undergone or been affected by a particular event’. The sense ‘knowledge or skill gained from such observation or from undergoing such events’ did not, however, emerge until the late 15th century. Expert was originally only an adjective, meaning ‘having experience of something’, or ‘trained by such experience’; its use as a noun only developed in the 19th century.
=> empirical, experiment, expert, peril, pirate, repertory[experience etymology, experience origin, 英语词源]
experience (n.): late 14c., "observation as the source of knowledge; actual observation; an event which has affected one," from Old French esperience "experiment, proof, experience" (13c.), from Latin experientia "a trial, proof, experiment; knowledge gained by repeated trials," from experientem (nominative experiens) "experienced, enterprising, active, industrious," present participle of experiri "to try, test," from ex- "out of" (see ex-) + peritus "experienced, tested," from PIE root *per- (3) "to lead, pass over" (see peril). Meaning "state of having done something and gotten handy at it" is from late 15c.
experience (v.): 1530s, "to test, try, learn by practical trial or proof;" see experience (n.). Sense of "feel, undergo" first recorded 1580s. Related: Experienced; experiences; experiencing.
experienced (adj.): "having experience, taught by practice, skillful through doing," 1570s, past participle adjective from experience (v.).
experiential (adj.): 1640s (implied in experientially), from Latin experientia "knowledge gained by testing or trials" (see experience (n.)) + -al (1).
experiment (n.): mid-14c., "action of observing or testing; an observation, test, or trial;" also "piece of evidence or empirical proof; feat of magic or sorcery," from Old French esperment "practical knowledge, cunning; enchantment, magic spell; trial, proof, example; lesson, sign, indication," from Latin experimentum "a trial, test, proof, experiment," noun of action from experiri "to test, try" (see experience (n.)).
experiment (v.): late 15c., from experiment (n.). Intransitive sense by 1787. Related: Experimented; experimenting.
experimental (adj.): mid 15c., "having experience," from experiment (n.) + -al (1). Meaning "based on experiment" is from 1560s. Meaning "for the sake of experiment" is from 1792.
experimentation (n.): 1670s, noun of action from experiment (v.).
inexperience (n.): 1590s, from French inexpérience (mid-15c.), from Late Latin inexperientia, from in- "not, opposite of" (see in- (1)) + experientia (see experience).
inexperienced (adj.): 1620s, adjective from inexperience.
unexperienced (adj.): 1560s, from un- (1) "not" + past participle of experience (v.).