irrhythmic

Etymology tree
Proto-Indo-European *né
Proto-Indo-European *n̥-
Proto-Italic *n̥-
Latin in-
Latin ir-
English ir-
Proto-Indo-European *ser-?
Proto-Indo-European *srew-
Proto-Indo-European *sru-dʰ-mo-s
Proto-Hellenic *hrutʰmós
Ancient Greek ῥῠθμός (rhŭthmós)bor.
Latin rhythmusder.
English rhythm
Proto-Indo-European *-ikos
Proto-Italic *-ikos
Latin -icuslbor.
Old French -iquebor.
Middle English -ik
English -ic
English irrhythmic
From ir- + rhythm + -ic.