1530s, from Modern Latin subsumere "to take under," from Latin sub "under" (see sub-) + sumere "to take, obtain, buy," from sus‑, variant of sub‑ "up from under" + emere "to take" (from PIE root *em- "to take, distribute"). Related: Subsumed; subsuming, subsumption.
This new system subsumes the old one
substitution
substract
substrate
substratum
substructure
subsume
subtend
subterfuge
subterranean
subtext
subtile