The Proto-Altaic word *tʰŭpʰi-
Word *tʰŭpʰi-
Meaning to spit, spittle, saliva

Other words that might be of interest
*bĕye ‘person, self, body’, *tālV- ‘to lick’, *tilV ‘tongue, voice’, gār(a) ‘hand, arm’, *kʰi̯ăli ‘tongue’, *kēpʰa ‘jaw, face’