Arrhythmic
/ˌeɪ.rɪˈθmɪk/noun
Lacking a regular rhythm or, in medicine, having an abnormal heart rhythm.
Did you know?The prefix a-/an- is the classic Greek “not/without” marker, so arrhythmic is one of those words whose meaning is built from pure negation, not metaphor.
Etymological Timeline
Ancient Greek
Greek
arrhythmos
“without rhythm, unrhythmic”
Late Latin
Latin
arrhythmus
“without rhythm”
16th-17th Century
English
arrhythme / arrhythmic
“lacking rhythm or regular measure”
Modern English
English
arrhythmic
“lacking a regular rhythm; medically, having an irregular heartbeat”