relaxer

The word "relaxer" is built upon the verb "relax," which entered English in the late 14th century from Latin relaxare, meaning "to loosen, open, stretch out, widen." This Latin verb itself is a compound of the prefix re-, suggesting an intensive action, and laxare, "to loosen," derived from the adjective laxus (loose). The core concept of loosening tension is preserved from its Proto-Indo-European root sleg-, meaning "to be slack or languid." The English agent noun suffix -er was then appended, creating a term for an agent that induces a state of loosening, whether applied to muscles, nerves, or, in modern commercial usage, the chemical treatment of hair.

Structure: re (again) + lax (loose) + er (agent suffix) re- is a Latin prefix meaning "again" or "back". lax comes from Latin laxus, meaning "loose, slack, open". -er is an Old English agent suffix indicating "a person or thing that performs an action".