thoughtless

[thawt-lis]

adjective

1. lacking in consideration for others; inconsiderate; tactless.

   a thoughtless remark.

   Synonyms: neglectful, negligent

2. characterized by or showing lack of thought: think: thought.

   a shallow, thoughtless book.

3. not thinking enough; careless or heedless.

   thoughtless of his health.

   Synonyms: remiss, inattentive

4. devoid of or lacking capacity for thought. think. thought.

thoughtless

/ ˈθɔːtlɪs /

adjective

1. inconsiderate

   a thoughtless remark

2. having or showing lack of thought

   a thoughtless essay

3. unable to think; not having the power of thought

Other Word Forms

• thoughtlessly adverb
• thoughtlessness noun

Word History and Origins

Origin of thoughtless¹

First recorded in 1585–95; thought ¹ + -less

Example Sentences

Perkins has sought specific training on how to sort out credible threats online from thoughtless reposts, allowing her to focus on students who pose real danger instead of punishing everyone.

From Salon

“Once again, to the Asian community, I am deeply sorry for my thoughtless mistake and the harm it caused,” she added.

From Los Angeles Times

Illustrating that judgment is a parade of filthy, thoughtless laborers drunkenly celebrating a completed job on a distant planet.

From Salon

Common decency and consideration have flown out the window in favor of non-stop branding and thoughtless cruelty, performed with ease.

From Salon

Most of it flies above the heads of viewers unfamiliar with that nation’s history or the economic and social impact of thoughtless political decisions enacted by the U.S.

From Salon

Related Words

• careless 
• foolish 
• ill-advised 
• ill-considered 
• irrational 
• mindless 
• reckless 
• senseless 
• stupid