Back-formed from 'mixt' (from Latin 'miscēre,' to mix) — speakers invented 'mix' as the base verb from the past participle.
To combine or put together to form one substance.
Back-formation from 'mixt' (mixed), past participle from Latin 'mixtus,' from 'miscēre' (to mix). The verb was created from the adjective — English speakers treated 'mixt' as a past tense and invented 'mix' as the present. Key roots: miscēre (Latin: "to mix, mingle").