or hel·la·ceous

[ he-ley-shuh s ]
/ hɛˈleɪ ʃəs /

adjective Slang.

remarkable; astonishing: They're raising a hellacious amount of money in taxes.
formidably difficult: We had a hellacious time getting here in the blizzard.

Origin of hellacious

hell + -acious (extracted from audacious, sagacious, vivacious, etc.), perhaps with intensive or augmentative force; cf. bodacious, splendacious
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for hellacious


/ (hɛˈleɪʃəs) /

adjective US slang

remarkable; horrifying
wonderful; excellent

Word Origin for hellacious

C20: from hell + -acious as in audacious
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for hellacious



1930s, college slang, from hell + fanciful ending (cf. bodacious).

Online Etymology Dictionary, © 2010 Douglas Harper