épaissir

== French == === Etymology === From épais +‎ -ir. === Pronunciation === IPA(key): /e.pɛ.siʁ/ ~ /e.pe.siʁ/ === Verb === épaissir to thicken, get/make thicker ==== Conjugation ==== This is a regular verb of the second conjugation, like finir, choisir, and most other verbs with infinitives ending in -ir. One salient feature of this conjugation is the repeated appearance of the infix -iss-. ==== Derived terms ==== épaississement === Further reading === “épaissir”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012