Etymology

reinforcer

R1E1I1N1F4O1R1C3E1R1

Today it means: Something that reinforces; something that strengthens a behavior. Full definition →

English reinforce ← Middle English re- ← Old French re-
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The story

  1. Proto-Italic*wre-
  2. Latinre-
  3. Old Frenchre-
  4. Middle Englishre-
  5. Englishre-
  6. Englishinforce
  7. Englishreinforce
  8. English todayreinforcer

From reinforce + -er.

Etymology from Wiktionary, CC BY-SA 4.0.