I'm going to say it might be knifes.
Edit: If it's correct, I'd like the brainliest answer.
The correct anwer is: Knifes
The correct way to spell it is: Knives
The grammatical rules state that for plural:
You ad -ves or -s to words ending on f or fe
There are exceptions to this rule that you must learn.
Words that end with ff you just add s, example: riff - riffs.
Some words that end in f you just add s, for example: oaf - oafs.
