relajarse

infinitive of relajar combined with se

(transitive) to relax, to loosen
(transitive) to soothe (e.g., the body, one's skin)
(figuratively, transitive) to loosen up, to ease up, to ease, to lighten, (e.g., a restriction, the mood)
(pronominal) to relax, to unwind, to chill, to chill out, to wind down, to kick back, to sit back, to loosen up, to decompress