In the Russian language, there are several groups of reflexive verbs. Verbs in the first group describe actions performed by the agent and directed back at the agent ("одева́ться" = "dress oneself", "умыва́ться" = "wash one’s own face"). Verbs in the second group describe reciprocal actions performed by two or more people towards one another (здоро́ваться = greet each, обнима́ться = hug each another). Verbs in the third group describe actions that are neither reflexive nor reciprocal. These verbs are simply never used without "-ся", and they have to be memorized. Here they are: