insidieux

== French == === Etymology === Learned borrowing from Latin īnsidiōsus. === Pronunciation === IPA(key): /ɛ̃.si.djø/ === Adjective === insidieux (feminine insidieuse, masculine plural insidieux, feminine plural insidieuses) insidious ==== Derived terms ==== insidieusement === Further reading === “insidieux”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012