mix in vs immix

mix in and immix both are verbs.

Word	Noun	Adjective	Verb	Adverb
mix in	No	No	Yes	No
immix	No	No	Yes	No

As verbs, immix is a hypernym of mix in; that is, immix is a word with a broader meaning than mix in:

Other hypernyms of mix in include blend, coalesce, combine, commingle, conflate, flux, fuse, meld, merge, mix.

mix in (verb)	immix (verb)
cause (something) to be mixed with (something else)	mix together different elements
add as an additional element or part