smother
Pronunciation: /ˈsmʌðə/
verb
- 1kill (someone) by covering their nose and mouth so that they suffocate: a teenage mum tried to smother her baby in hospital
- make (someone) feel trapped and oppressed by acting in an overly protective manner towards them: it’s time for you to leave the house—she’ll smother you if you remain

Origin:
Middle English (as a noun in the sense 'stifling smoke'): from the base of Old English smorian 'suffocate'