lẫn

Etymology
Maybe, non attested, citation needed.

Verb

 * 1) to confuse; to mistake (one for another)
 * 2) to be confused; to be muddled; to be in one's dotage
 * 3) to be mixed up (with)

Adverb

 * 1) each other; one another

Conjunction

 * 1)  (both …) and …