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admixture (n.)[admixture 词源字典]: c. 1600, with -ure, from admix (1530s), a back-formation from admixt (early 15c.), from Latin admixtus "mixed with," past participle of admiscere "to add to by mingling, mix with," from ad- "to" (see ad-) + miscere "to mix" (see mix). In Middle English admixt was mistaken as a past participle of a (then) non-existent *admix. Earlier in this sense was admixtion (late 14c.).[admixture etymology, admixture origin, 英语词源]
admixtion: "= admixture", Late Middle English; earliest use found in John Trevisa (c1342–?1402), translator. From classical Latin admixtiōn-, admixtiō admixture from admixt-, past participial stem of admiscēre + -iō. Compare mixtion and commixtion.