tranquil
adj.
mid-15c., a back-formation from tranquility or else from Latin tranquillus "quiet, calm, still." Related: Tranquilly.
| 词汇 | tranquil | 
| 词根词缀 | Online Etymology Dictionary tranquil adj. mid-15c., a back-formation from tranquility or else from Latin tranquillus "quiet, calm, still." Related: Tranquilly. | 
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