smother

Then she buried her head under a pillow, from which some sort of unidentifiable, repetitive, smothered sound—weeping? sneezing? giggling?—could be heard.

Valerie, sick with the flu, had been awakened by a night nurse, who informed her that she, the night nurse, had rolled on top of the baby in her sleep and smothered him.

Critics fear deep-sea mining will smother marine life with waste and the noise of heavy machinery will disrupt oceanic migrations.

I like the oven style chicken burrito smothered.

Those leaves will smother the grass as they insulate the ground and hold in moisture.