thoughtless

American  

[thawt-lis] / ˈθɔt lɪs /

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.

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thoughtless British  

/ 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

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Other Word Forms

• thoughtlessly adverb
• thoughtlessness noun

Etymology

Origin of thoughtless

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

Example Sentences

I will stand up to people who are cruel or thoughtless, and I will stand beside those who are too easy to pick on.

From Literature

“Oliver was thoughtless there, but Rachel was the real villain. She knew exactly what she was doing.”

From Literature

Not with an impossible grading policy or a thoughtless change to my course, but by letting students use artificial intelligence on team assignments.

From The Wall Street Journal

Every so often she had to maneuver around pieces of junk that thoughtless humans had dumped into the ocean—an old DVD player, a sofa and even a toilet.

From Literature

Her volition and intention don’t matter because an artist who is in on the joke makes hating less fun for the thoughtless critic.

From Salon

Related Words

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