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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]
elephant (n.): c. 1300, olyfaunt, from Old French olifant (12c., Modern French éléphant), from Latin elephantus, from Greek elephas (genitive elephantos) "elephant; ivory," probably from a non-Indo-European language, likely via Phoenician (compare Hamitic elu "elephant," source of the word for it in many Semitic languages, or possibly from Sanskrit ibhah "elephant").

Re-spelled after 1550 on Latin model. Cognate with the common term for the animal in Romanic and Germanic; Slavic words (for example Polish slon', Russian slonu are from a different word. Old English had it as elpend, and compare elpendban, elpentoð "ivory," but a confusion of exotic animals led to olfend "camel."

As an emblem of the Republican Party in U.S. politics, 1860. To see the elephant "be acquainted with life, gain knowledge by experience" is an American English colloquialism from 1835. The elephant joke was popular 1960s-70s.