cram (v.) Look up cram at Dictionary.com
Old English crammian "press something into something else," from Proto-Germanic *kram-/*krem- (cognates: Old High German krimman "to press, pinch," Old Norse kremja "to squeeze, pinch"), from PIE root *ger- "to gather" (see gregarious). Meaning "study intensely for an exam" originally was British student slang first recorded 1803. Related: Crammed; cramming.