Fast-acting

adj

adj ·Rare ·Advanced level

Definitions

Adjective
  1. 1
    taking effect quickly

    "Is this a fast-acting cancer?"

Synonyms

All synonyms
short-acting

Example

More examples

"The spiders have a highly toxic, fast-acting venom that can kill a person, with 13 recorded deaths from bites."

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