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thought·less
 thoughtless
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- pronunciation:
- thawt
lihs
- features:
- Word Explorer, Word Parts
| part of speech: |
adjective |
| definition 1: |
not thinking enough; showing little care.
The thoughtless driver sped through the red light.- synonyms:
- careless, rash, reckless
- antonyms:
- careful, thoughtful
- similar words:
- foolish, impetuous
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| definition 2: |
showing a lack of thought or attention.
There were many thoughtless mistakes on her spelling test.- antonyms:
- thoughtful
- similar words:
- careless, dumb, shallow, stupid, vacant
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| definition 3: |
not giving attention to the needs of others; inconsiderate.
It was thoughtless of you to eat all the sandwiches.- synonyms:
- inconsiderate, insensitive
- antonyms:
- considerate, thoughtful
- similar words:
- discourteous, impolite, rude
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| related words: |
careless, casual, impulsive, rash, snap |
| derivations: |
thoughtlessly (adv.), thoughtlessness (n.) |
The word thoughtless
contains the following part:
-less
Middle English
adjective-forming suffix
that means without
  More about this word part:
The suffix -less
attaches primarily to monosyllabic English nouns. However, -less
is a fully productive suffix, meaning it can be added to any noun to form legitimate new words.
Example words:
aimless, breathless, careless, countless, doubtless, endless, fearless, heartless, helpless, homeless, hopeless, penniless, priceless, regardless, restless, sightless, tasteless, thoughtless, useless, wireless, weightless, worthless
- synonyms:
- a-1, an-1
- antonyms:
- -ful1
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