🔪 An attacker 🛠️ A knife maker 🥗 A food cutter

knifer

9.3

A person who attacks or hurts someone with a knife

noun
/ˈnaɪfər/

Offensive

: apuñalador

The police arrested the knifer after he attacked a man in the alley.

Examples

"Drop him," Carella said, and fired the first shot, hitting the knifer in the right thigh, collapsing him to his knees.

Fiction book (1999)
The victim was hospitalized after being attacked by a knifer outside the nightclub.
"Oh, yeah?" the knifer in the cage said again, and slashed the air.

Fiction book (1999)
Witnesses described the knifer as wearing a black hoodie and running away from the scene.

Synonyms

slasher

vsknifer

NSFW

7 8.7

A person who attacks others by cutting them with a sharp knife

covers any knife attack not only cutting or slashing motions

stabber

vsknifer

NSFW

6 6.3

A person who hurts someone with a knife or other sharp object

covers attackers who injure others with a knife in any way

knifeman

vsknifer

Offensive

7.8

A man who uses a knife to hurt or threaten other people

is gender neutral and applies to any person who attacks with a knife

blader

vsknifer

NSFW

9.9

A person who cuts or wounds someone with a knife

narrows to attacks with a knife specifically rather than any blade tool

Antonyms

protector

129 2.8

A person who defends and cares for another person or thing

peacekeeper

6 4.1

A person who stops or calms arguments and makes people get along

How Violent

murderer

NSFW

946 3.4

knifer

Offensive

9.3

assailant

NSFW

85 6.6

aggressive

311 3.7

bystander

84 3.4

Surface Forms

knifer singular

knifers plural

Morphology

knifer = knife (transparent) = knife + er

The word is a regular agent noun formed from 'knife' plus '-er', so the relationship is straightforward.

Etymology

Knifer is made from knife + -er, where -er means 'person who does something'. So, in reports about crime, knifer often means 'a person who attacked or injured someone with a knife'.