Thorough-

prefix

prefix ·Rare ·Advanced level

Definitions

Prefix
  1. 1
    through, passing via idiomatic, morpheme

    "thoroughfare, thoroughgo, thoroughlane"

  2. 2
    fully, completely; purely idiomatic, morpheme

    "thoroughgoingly, thoroughbreed, thoroughpaced"

Synonyms

All synonyms
diaper

Example

More examples

"thoroughfare, thoroughgo, thoroughlane"

Etymology

A variant of through-, common in 16th-19th centuries, particularly where there is a perceived connection with thorough “thorough-”, in OED Online ⁠, Oxford: Oxford University Press, launched 2000..

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.