- base (n.)
- "bottom, foundation, pedestal," early 14c., from O.Fr. bas "depth" (12c.), from L. basis "foundation," from Gk. basis "step, pedestal," from bainein "to step" (see come). The military sense is from 1860. The chemical sense (1810) was introduced in French 1754 by Fr. chemist Guillaume-François Rouelle (1703-1770). The verb meaning "to place on a foundation" is from 1841.
- base (adj.)
- late 14c., from O.Fr. bas (Mod.Fr. bas) "low, lowly, mean," from L.L. bassus "thick, stumpy, low" (used only as a cognomen in classical Latin, humilis being there the usual word for "low in stature or position"), possibly from Oscan, or Celtic, or related to Gk. basson, comparative of bathys "deep." Figurative sense of "low in the moral scale" is first attested 1530s in English, earlier "servile" (1520s). Base metals (c.1600) were worthless in contrast to noble or precious metals.