Unmind is from un- ('not, reverse') + mind (verb), from Old English gemynd ('memory, thought'), from Proto-Germanic *gamundiz, from PIE *men- ('to think'). Important recorded forms include un- (Old English), gemynd (Old English), and *men- (Proto-Indo-European). Morphologically, the un- element marks negation, reversal, removal, or deprivation, while the base supplies the action, quality, or state being denied or undone. The modern sense continues the older lexical line without requiring a separate origin. In current use it covers to take no notice of; disregard. The wider family includes derived forms such as unminded and related words such as mind, mindful, and mindless.