• synonyms


See more synonyms for treat on Thesaurus.com
verb (used with object)
  1. to act or behave toward (a person) in some specified way: to treat someone with respect.
  2. to consider or regard in a specified way, and deal with accordingly: to treat a matter as unimportant.
  3. to deal with (a disease, patient, etc.) in order to relieve or cure.
  4. to deal with in speech or writing; discuss.
  5. to deal with, develop, or represent artistically, especially in some specified manner or style: to treat a theme realistically.
  6. to subject to some agent or action in order to bring about a particular result: to treat a substance with an acid.
  7. to entertain; give hospitality to: He treats diplomats in the lavish surroundings of his country estate.
  8. to provide food, entertainment, gifts, etc., at one's own expense: Let me treat you to dinner.
Show More
verb (used without object)
  1. to deal with a subject in speech or writing; discourse: a work that treats of the caste system in India.
  2. to give, or bear the expense of, a treat: Is it my turn to treat?
  3. to carry on negotiations with a view to a settlement; discuss terms of settlement; negotiate.
Show More
  1. entertainment, food, drink, etc., given by way of compliment or as an expression of friendly regard.
  2. anything that affords particular pleasure or enjoyment.
  3. the act of treating.
  4. one's turn to treat.
Show More

Origin of treat

1250–1300; Middle English treten (v.) < Old French tretier, traitier < Latin tractāre to drag, handle, treat, frequentative of trahere to drag. See tract1
Related formstreat·er, nounnon·treat·ed, adjectiveo·ver·treat, verbself-treat·ed, adjectiveun·treat·ed, adjectivewell-treat·ed, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for untreated

organic, unprocessed, natural, rough, coarse, basic, crude, fresh, uncooked, untreated, green, native, bloody, callow, fibrous, hard, immature, impure, rude, underdone

Examples from the Web for untreated

Contemporary Examples of untreated

Historical Examples of untreated

  • If untreated it lasts for years and it may destroy the cornea and consequently the sight.

  • The life-history of an untreated gumma varies with its environment.

    Manual of Surgery

    Alexis Thomson and Alexander Miles

  • This "treated" filament has a coating of hard carbon and its electrical resistance is greater than that of the untreated filament.

    Artificial Light

    M. Luckiesh

  • The treated filament was found to be a harder form of carbon that did not volatilize as rapidly as the untreated filament.

    Artificial Light

    M. Luckiesh

  • This untreated rock, pulverized exceedingly fine, often is known as floats.

British Dictionary definitions for untreated


  1. (of an illness, etc) not having been dealt with
  2. not having been processed in any wayuntreated sewage
Show More


  1. a celebration, entertainment, gift, or feast given for or to someone and paid for by another
  2. any delightful surprise or specially pleasant occasion
  3. the act of treating
Show More
  1. (tr) to deal with or regard in a certain mannershe treats school as a joke
  2. (tr) to apply treatment toto treat a patient for malaria
  3. (tr) to subject to a process or to the application of a substanceto treat photographic film with developer
  4. (tr ; often foll by to) to provide (someone) (with) as a treathe treated the children to a trip to the zoo
  5. (intr usually foll by of) formal to deal (with), as in writing or speaking
  6. (intr) formal to discuss settlement; negotiate
Show More
Derived Formstreatable, adjectivetreater, noun

Word Origin for treat

C13: from Old French tretier, from Latin tractāre to manage, from trahere to drag
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for untreated



c.1300, "negotiate, bargain, deal with," from Old French traiter (12c.), from Latin tractare "manage, handle, deal with," originally "drag about," frequentative of trahere (past participle tractus) "to pull, draw" (see tract (n.1)). Meaning "to entertain with food and drink by way of compliment or kindness (or bribery)" is recorded from c.1500. Sense of "deal with in speech or writing" (early 14c.) led to the use in medicine (1781), "to attempt to heal or cure." Related: Treated; treating.

Show More



late 14c., "action of discussing terms," from treat (v.). Sense of "a treating with food and drink" (1650s) was extended by 1770 to "anything that gives pleasure."

Show More
Online Etymology Dictionary, © 2010 Douglas Harper

untreated in Medicine


  1. To give medical aid to someone.
  2. To give medical aid to counteract a disease or condition.
Show More
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Idioms and Phrases with untreated


In addition to the idiom beginning with treat

  • treat like dirt

also see:

  • Dutch treat
  • trick or treat
Show More
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.