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collusive

[kuh-loo-siv]
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adjective
  1. involving collusion; fraudulently contrived by agreement: a collusive agreement to increase prices.

Origin of collusive

First recorded in 1665–75; collus(ion) + -ive
Related formscol·lu·sive·ly, adverbcol·lu·sive·ness, nounnon·col·lu·sive, adjectivenon·col·lu·sive·ly, adverbnon·col·lu·sive·ness, nounpre·col·lu·sive, adjectiveun·col·lu·sive, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Word Origin and History for noncollusive

collusive

adj.

1670s, from Latin collus-, past participle stem of colludere (see collude) + -ive.

Online Etymology Dictionary, © 2010 Douglas Harper