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rhathymia

American  
[ruh-thahy-mee-uh] / rəˈθaɪ mi ə /

noun

  1. carefree behavior; lightheartedness.

Etymology

Origin of rhathymia

First recorded in 1935–40; from Greek rhāithȳmía “easiness of temper, amusement, indifference,” equivalent to rhā́ithȳm(os) “easygoing” + -ia -ia

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.