The verbs are called reflexive when the action is projected on oneself (specifically on the person who is speaking).
In Italian, reflexive verbs consist of two elements:
Verb + particles si (if the verb is in the infinitive form)
lavarsi – to wash (= to take a shower, i.e. to wash oneself)
vestirsi – to get (yourself) dressed
When conjugating a reflexive verb, the particle si changes in singularities and numbers, transforming into:
mi – used for first person singular (io)
ti – used for second person singular (tu)
si – used for third person singular (lui, lei, Lei)
ci – used for first person plural (noi)
vi – used for second person plural (voi)
si – used for third person plural (loro)
Herewith, the reflexive particle si is placed in front of the «tail» of the verb.