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regardless

[ri-gahrd-lis] /rɪˈgɑrd lɪs/
adjective
1.
having or showing no regard; heedless; unmindful (often followed by of).
adverb
2.
without concern as to advice, warning, hardship, etc.; anyway:
I must make the decision regardless.
Idioms
3.
regardless of, in spite of; without regard for:
They'll do it regardless of the cost.
Origin
1585-1595
1585-95; regard + -less
Related forms
regardlessly, adverb
regardlessness, noun
Can be confused
irregardless, regardless (see usage note at irregardless)
Synonyms
1. inattentive, negligent, neglectful, indifferent, unconcerned.
Antonyms
1. attentive, mindful.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for regardlessness

regardless

/rɪˈɡɑːdlɪs/
adjective
1.
(usually foll by of) taking no regard or heed; heedless
adverb
2.
in spite of everything; disregarding drawbacks: to carry on regardless
Derived Forms
regardlessly, adverb
regardlessness, noun
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
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Word Origin and History for regardlessness

regardless

adj.

"indifferent," 1590s, from regard (n.) + -less. Elliptical for "regardless of consequences, expenses, etc.," from 1872.

Online Etymology Dictionary, © 2010 Douglas Harper
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