Poly is Greek for “many” and amor is Latin for “love”. Same goes for homo, which is Greek for “same” and sex, which is Latin for… “sex”.
Homosexuality? What barbarity! It’s half Greek and half Latin! — from the 1997 play The Invention of Love
There are a ton of other hybrid words like this: television, neuroscience, monolingual, sociology, amoral, bureaucracy, etc. In fact, there are so many that a word for words like this should exist: heteroriginal, from the Greek hetero meaning “different” and the Latin origin, meaning… “origin”.