Definition of "unsecure"

unsecure¹

adjective
comparative more unsecure, superlative most unsecure
1. (rare) insecure
  Quotations
  All great concernments must delays endure;Rashness and haste make all things unsecure.
  1668, John Denham, Of Prudence (poem)
  Has my GoodnesClemencie, loue, and fauour gratious raysed theeFrom a Condition next to popular labourTooke thee from all the dubitable hazardsOf Fortune, her most unsecure aduenturesAnd grafted thee into a Branch of honor […]
  1624, Thomas Middleton, A Game at Chesse
  […] [the elevator] was in operation when it fell; its fall was due to the settling of the piers and the unsecure foundation of the elevator […]
  1883, N. Y. Supreme Court, page 43
  In this chapter, you examine methods for encrypting data before it is sent across an unsecure network such as the Internet.
  2004, Stephen Walther, ASP.NET unleashed 2003, page 923
  Unsecure networks pose a substantial security risk to your systems or data.
  2007, Brian Koerner, Windows Vista Security for Dummies, page 223

unsecure²

verb
third-person singular simple present unsecures, present participle unsecuring, simple past and past participle unsecured
1. (transitive) To make insecure or less secure.