Pronouns that refer back to the subject of the sentence, used with reflexive verbs.

They change based on case (Accusative or Dative).

Examples

Accusative: mich (myself), dich (yourself), sich (himself/herself/itself), uns (ourselves), euch (yourselves), sich (themselves).

Dative: mir (myself), dir (yourself), sich (himself/herself/itself), uns (ourselves), euch (yourselves), sich (themselves).

Ich wasche mich.
I wash myself.

See also

Pronoun
Personal pronoun
Possessive pronoun
Relative pronoun