rarefer

== Catalan == === Etymology === From Latin rārēfaciō. === Verb === rarefer (first-person singular present rarefaig, first-person singular preterite rarefiu, past participle rarefet) (physics, transitive) to rarify Synonym: rarificar ==== Conjugation ==== ==== Related terms ==== === Further reading === “rarefer”, in Gran Diccionari de la Llengua Catalana, Grup Enciclopèdia Catalana, 2026