Omnis

Etymology
From, from the verbal root. Related to ops: and opus:. It could also reflect the base (c.f. opto:), which de Vaan gives a slight preference for semantic reasons.

Adjective

 * 1) (singular) every
 * 2) (plural) all

Derived terms

 * extrā omnēs ('out, all of you.', 'everybody else, out')
 * omnipotens
 * omnisciens