c.1374, from O.Fr.
resister, from L.
resistere "to resist, to stand back, withstand," from
re- "against" +
sistere "take a stand, stand firm" (see
assist).
Resistance is attested from 1417, from O.Fr.
resistence, from L.L.
resistentia, from L.
resistentem (nom.
resistens), prp. of
resistere. Sense of "organized covert opposition to an occupying power" first recorded 1940 in reference to Fr. opposition to Nazi rule. Since applied to similar organizations (e.g. anti-Soviet fighters in Afghanistan, 1980s). Electromagnetic sense is from 1860.