unsecure · adjective1
From un- (“not”) + secure (adjective). Piecewise doublet of insecure and unsure, as well as of etymology 2.
unsecure · verb2
From un- (inversive prefix) + secure (verb). Piecewise doublet of insecure and unsure, as well as of etymology 1.
Etymology from Wiktionary, CC BY-SA 4.0.