different between thoughtless vs unthinkable

English

Etymology

thought +? -less

Pronunciation

• (UK) IPA^(key): /????tl?s/, /????tl?s/
• (General American) enPR: thôt’l?s, thôt’l?s, IPA^(key): /???tl?s/, /???tl?s/
• (cot–caught merger) enPR: thät’l?s, thät’l?s, IPA^(key): /???tl?s/, /???tl?s/

Adjective

thoughtless (comparative more thoughtless, superlative most thoughtless)

1. Marked by or showing lack of due thought or care; careless.
2. Inconsiderate, inattentive.

   A thoughtless remark.

3. Lacking thought or consideration.

   The debate turned into thoughtless bickering.

Coordinate terms

• short-sighted

Derived terms

• thoughtlessly
• thoughtlessness

Translations

English

Etymology

un- +? think +? -able

Pronunciation

• IPA^(key): /?n????k?b?l/

Adjective

unthinkable (comparative more unthinkable, superlative most unthinkable)

1. Incapable of being believed; incredible.
2. Inconceivable or unimaginable; extremely improbable in a way that goes against common sense.

   Nothing is unthinkable, nothing impossible to the balanced person, provided it comes out of the needs of life and is dedicated to life's further development - Lewis Mumford

Translations

References

• Douglas Harper (2001–2021) , “unthinkable”, in Online Etymology Dictionary