讐

Han character

 * 1) enemy, rival, opponent

Kanji

 * 1) enemy
 * 2) revenge, vengeance

Etymology
→

A sound shift in the from earlier form ata, itself from classical verb, which became modern.

Noun

 * 1) an opponent, an enemy, a foe
 * 2) harm, injury
 * 3) terrible treatment (of someone or something)
 * 4) hate towards someone, a grudge

Usage notes
The spelling is much more common.

Etymology
From.