knife

(noun) edge tool used as a cutting instrument; has a pointed blade with a sharp edge and a handle.

(noun) a weapon with a handle and blade with a sharp point.

(noun) any long thin projection that is transient. Synonyms: tongue. Examples: "Tongues of flame licked at the walls." "Rifles exploded quick knives of fire into the dark."

(verb) use a knife on. Synonyms: stab. Example: "The victim was knifed to death."