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thought·ful (thôtfəl)
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adj.
1.
a. Given to careful thought; reflective: Every thoughtful person should read the article.
b. Engrossed in thought: She was thoughtful the whole way home on the bus.
2. Exhibiting or characterized by careful thought: a thoughtful essay.
3. Having or showing heed for the well-being or happiness of others and a propensity for anticipating their needs or wishes.

thoughtful·ly adv.
thoughtful·ness n.

Synonyms: thoughtful, considerate, attentive, solicitous
These adjectives mean having or showing concern for the well-being of others. Although thoughtful and considerate are often used interchangeably, thoughtful implies a tendency to anticipate needs or wishes, whereas considerate stresses sensitivity to another's feelings: a thoughtful friend who brought me soup when I was sick; considerate, quiet neighbors. Attentive suggests devoted, assiduous attention: an excellent host who was attentive to the needs of his guests. Solicitous implies deep concern, sometimes accompanied by worry: a mother who is very solicitous of her asthmatic child. See Also Synonyms at pensive.

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
 

Indo-European & Semitic Roots Appendices

    Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:

    Indo-European Roots

    Semitic Roots

    The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.

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