crush (v.) Look up crush at Dictionary.com
mid-14c., from Old French cruissir (Modern French écraser), variant of croissir "to gnash (teeth), crash, break," perhaps from Frankish *krostjan "to gnash" (cognates: Gothic kriustan, Old Swedish krysta "to gnash"). Figurative sense of "to humiliate, demoralize" is c.1600. Related: Crushed; crushing. Italian crosciare, Catalan cruxir, Spanish crujirare "to crack" are Germanic loan-words.
crush (n.) Look up crush at Dictionary.com
1590s, "act of crushing," from crush (v.). Meaning "thick crowd" is from 1806. Sense of "person one is infatuated with" is first recorded 1884; to have a crush on is from 1913.