This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. An instance of stabbing with a knife.

v. Present participle of knife.

"Stripping line from the reel, he rocketed across a barely submerged gravel bar, dorsal fin knifing the air."

knifed    knifes    knifing    knives   

projection   

tuning-knife    saddlers' knife    table-knife    boat-knife    round knife    dessert-knife    slide-knife    a pair of knives    boarding-knife    half-moon knife   

knives   

knifed    knifing   

stab    betray   

Fife    Life    co-wife    fife    life    rife    saif    strife    wife   

sword    dagger    weapon    stick    tool    spear    clothe    arrow    piece    tooth