thoughtless

[thawt-lis]

See more synonyms for thoughtless on Thesaurus.com

adjective

lacking in consideration for others; inconsiderate; tactless: a thoughtless remark.
characterized by or showing lack of thought: a shallow, thoughtless book.
not thinking enough; careless or heedless: thoughtless of his health.

devoid of or lacking capacity for thought.

Origin of thoughtless

First recorded in 1585–95; thought¹ + -less

Related formsthought·less·ly, adverbthought·less·ness, noun

Synonyms for thoughtless

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1. negligent, neglectful. 3. inattentive, remiss.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for thoughtlessness

inconsiderateness, negligence, carelessness, inattention, oversight, disregard, neglect

Examples from the Web for thoughtlessness

Contemporary Examples of thoughtlessness

Unless said partner is ready to be whacked over their head with the box for their thoughtlessness, they have made a grave mistake.
Dita Von Teese, Keep Your Hands Off Our Boobs
Emma Mahony
August 6, 2014

Historical Examples of thoughtlessness

It has been the result of thoughtlessness, rather than of malignity.
Female Scripture Biographies, Vol. I
Francis Augustus Cox
However, he now experienced sudden remorse for his thoughtlessness.
The Three Cities Trilogy, Complete
Emile Zola
Fine would then interpose, with a thoughtlessness of which she soon repented.
The Fortune of the Rougons
Emile Zola
Earnestness is the path of immortality (Nirvana), thoughtlessness the path of death.
The Dhammapada
Unknown
People praise earnestness; thoughtlessness is always blamed.
The Dhammapada
Unknown

British Dictionary definitions for thoughtlessness

thoughtless

adjective

inconsideratea thoughtless remark
having or showing lack of thoughta thoughtless essay
unable to think; not having the power of thought

Derived Formsthoughtlessly, adverbthoughtlessness, 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

Word Origin and History for thoughtlessness

thoughtless

adj.

"inconsiderate," 1794, from thought + -less. Related: Thoughtlessly; thoughtlessness.