Unagitated is from un- ('not') + agitated, past participle of agitate, from Latin agitatus, past participle of agitare ('to put in motion, drive'), frequentative of agere ('to drive, act'). Important recorded forms include un- (Old English), agitare (Latin), and agere (Latin). 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 is largely compositional, with the historical elements narrowing into a stable English lexical item. In current use it covers calm and undisturbed; not stirred or troubled. The wider family includes related words such as agitate, agitation, agitated, and agitator.