Learn how to say Knife correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word knife:
noun (plural knives /nʌɪvz/)
an instrument composed of a blade fixed into a handle, used for cutting or as a weapon.
a cutting blade forming part of a machine.
stab (someone) with a knife:
he was knifed to death during the argument
[no object, with adverbial] cut or move cleanly through something with a knife-like action:
a shard of steel knifed through the mainsail