thorough

Thorough describes something that is painstakingly complete, like a thorough search for your missing keys in which you look for them in coat pockets, under the table, in the refrigerator — in every single place you can think of.

Thorough rhymes with "burrow": "THUR-oh." It looks a lot like through but remember thorough is an adjective, so you might use it to describe a thorough investigation or a thorough review. In contrast through is used most often as a preposition — you might look through every drawer, for example, in a search — or as an adverb — you might see a hole in your pocket where coins fall through.

Definitions of thorough
  1. adjective
    painstakingly careful and accurate
    “our accountant is thorough
    thorough research”
    Synonyms:
    careful
    exercising caution or showing care or attention
  2. adjective
    performed comprehensively and completely
    “made a thorough search”
    synonyms: exhaustive, thoroughgoing
    complete
    having every necessary or normal part or component or step
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