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knife

1 knife /ˈnaɪf/ noun
plural knives /ˈnaɪvz/
1 knife
/ˈnaɪf/
noun
plural knives /ˈnaɪvz/
Britannica Dictionary definition of KNIFE
[count]
: a usually sharp blade attached to a handle that is used for cutting or as a weapon
see picture at place setting; see also butter knife, carving knife, palette knife, paring knife, steak knife, utility knife

like a (hot) knife through butter

informal
: very quickly and easily

the knives are out (for someone)

used to say that people are ready to blame or punish someone for something often in a way that is unfair

twist/turn the knife (in the wound)

informal
: to say or do things that cause more pain to someone who is already suffering

under the knife

informal
: having a medical operation
2 knife /ˈnaɪf/ verb
knifes; knifed; knifing
2 knife
/ˈnaɪf/
verb
knifes; knifed; knifing
Britannica Dictionary definition of KNIFE
[+ object] : to injure (someone) with a knife
[no object] : to move easily and quickly like a knife cutting through something