Inseparable
来自Big Physics
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late Middle English: from Latin inseparabilis, from in- ‘not’ + separabilis (see separable).
wiktionary
From Middle English, from Middle French inséparable, from Latin īnsēparābilis. Constructed as in- + separable.
etymonline
inseparable (adj.)
mid-14c., from Latin inseparabilis "that cannot be separated," from in- "not, opposite of" (see in- (1)) + separabilis, from separare "to pull apart" (see separate (v.)). Related: Inseparably.