A hybrid word is a word that was coined using roots from at least two different languages. In English, this most often means Latin and Greek, and the traditional example of such a word is 'sociology'; with the Latin socius ('associate') married to the Greek suffix -logie ('the study of').
Other popular examples of Greek and Latin mashups include 'automobile' (Greek autos and Latin mobilis); biathlon (Latin bis, Greek athlon); claustrophobia (Latin claustrum, Greek phobos); genocide (Greek genos, Latin cīdere); and television (Greek tēle, Latin visio), among dozens of others.
Place names are common sources of hybrid words, such as the famous Torpenhow, comprised of the Old English word torr (meaning 'hill'), the Celtic/Scots pen (hill), and the Old English hoh (hill); as a side note, many translate Torpenhow Hill as "hill hill hill hill", making it an extremely tautological name, but also there is not actually any place named Torpenhow Hill (Torpenhow, yes, Torpenhow Hill, no), so it is also a ghost word.
My favorite example of a hybrid word is 'ampersand', a contraction of "and per se and", a Latin snippet stuck between paired English bookends. However, others might find 'intertangled' more pleasing, being Latin inter, Scandinavian tagilen, and Old English -ed, all intertangled together.