Smothering
Smothering was a method of killing someone that involved covering their mouth and nose to cut off their respiration.
In 2268, Rizzo described being attacked by the dikironium cloud creature as comparable to being smothered in honey. (TOS: "Obsession")
In 2269, after transferring her consciousness into James T. Kirk's body and vice versa, Janice Lester told Kirk that he should have smothered the life from her, so she could have died of radiation poisoning in the line of duty. (TOS: "Turnabout Intruder")
The term could also be used to describe overwhelming someone with affection and attention. In 2375, Ezri Dax accused her mother Yanas Tigan of smothering her brother Norvo. (DS9: "Prodigal Daughter")
In 2378, Q tried smothering his son with attention as per Kathryn Janeway's suggestion, only to embarrass the boy. (VOY: "Q2")