rennet

Origin

From Middle English rennet, from Old English *rynnet, *ġerynnet, from Proto-West Germanic *garunniþu (“coagulation, curdling, rennet”), cognate with Old Saxon girunnida (“a running together, coagulation”), Old High German girunnida (“rennet, coagulation”), Middle High German gerinnede (“that which is curdled”). Compare also Middle English renelesse, renels, renlys, rendlys (“rennet”), Middle Dutch rinsel, runsel (“rennet”), German Rennsel; further to Middle English irennen (“to curdle; to run”), Old English ġerennan (“to coagulate”), Old High German girunst (“rennet”), German gerinnen (“to coagulate; congeal”).