Thoughtful

wiktionary

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From Middle English thoȝtful, thohtful, equivalent to thought +‎ -ful. Compare Dutch gedachtenvol.

etymonline

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thoughtful (adj.)

c. 1200, "contemplative, occupied with thought," from thought + -ful. Also in Middle English, "prudent; moody, anxious." Meaning "showing consideration for others" is from 1851 (compare thoughtless.) Related: Thoughtfully; thoughtfulness.