Per-

prefix

prefix ·Rare ·Advanced level

Definitions

Prefix
  1. 1
    In verbs: denoting the sense "through", as in perforate. idiomatic, morpheme
  2. 2
    Denoting the sense "by" or "per", as in perchance or perhaps. idiomatic, morpheme
  3. 3
    In verbs: denoting the sense "thoroughly", as in perfect. idiomatic, morpheme
  4. 4
    In verbs: denoting the sense "to destruction", as in pervert. idiomatic, morpheme
  5. 5
    In adjectives and adverbs: denoting the sense "extremely", as in perfervid. idiomatic, morpheme
Show 2 more definitions
  1. 6
    Forming nouns and adjectives denoting the maximum proportion of one element in a compound, as in peroxide. morpheme
  2. 7
    Added to the name of an element in a polyatomic ion to denote the number of atoms of that element (usually four). morpheme

Etymology

Etymology 1

Borrowed from Latin per and per-.

Etymology 2

Borrowed from Old French per (modern French par).

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