From Latin 'adjungere' (to join to) — something attached but subordinate, joined to a larger whole.
A thing added to something else as a supplementary rather than essential part; connected or added to something in a subordinate capacity.
From Latin 'adiūnctus' (joined to, attached), past participle of 'adiungere' (to join to, to attach, to yoke together), from 'ad-' (to, toward) + 'iungere' (to join, to yoke), from PIE *yewg- (to join, to yoke). The PIE root *yewg- is one of the best-attested roots in comparative linguistics, appearing with remarkable consistency across the family: Sanskrit 'yuj' (to yoke), Greek 'zygón' (yoke), Latin 'iugum' (yoke), Old English 'geoc' (yoke, giving modern 'yoke'), Hittite 'yugan' (yoke), and Old Church Slavonic 'igo' (yoke). The yoke — the wooden beam
The phrase 'adjunct professor' in American academia denotes a part-time instructor hired on a temporary, per-course basis — literally someone 'joined to' the faculty without being a full member. As of the 2020s, adjunct faculty teach more than half of all college courses in the United States while typically earning a fraction of full-time pay with no benefits. The Latin etymology is precise: adjuncts are