Word: thoughtless
Part of speech: Adjective
Syllables: thought
less
Definition: Inconsiderate, inattentive.
Morphemes:
Affix: thought
Language: en
PoS: Noun
Meaning: Anxiety, distress.
Affix: -less
Language: en
PoS: Suffix
Meaning: Lacking (something); without (something). Added usually to a noun to form an adjective signifying a lack of that noun.