coarticulate

co- +‎ articulate

coarticulate (third-person singular simple present coarticulates, present participle coarticulating, simple past and past participle coarticulated)

1. To articulate two things simultaneously.
2. (anatomy) To unite to form an articulation (joint)
3. (phonology) To assimilate the place of articulation of one speech sound to that of an adjacent speech sound.
4. (phonetics) To articulate a speech sound at two different places of articulation simultaneously, as in the labiovelar approximant [w].