English word shrink comes from Proto-Indo-European *(s)ker-, and later Proto-Germanic *skrinkwaną (To shrink, pull together, shrivel.)

Detailed word origin of shrink

Dictionary entry	Language	Definition
*(s)ker-	Proto-Indo-European (ine-pro)	to turn, to bend, to turn, to bend, to turn, bend  , to move, swing, jump, to cut  , twist, turn, bend
*kr̥-	Proto-Indo-European (ine-pro)
*skrinkwaną	Proto-Germanic (gem-pro)	To shrink, pull together, shrivel.
sċrincan	Old English (ang)
scrincan	Old English (ang)	To shrink.
shrinken	Middle English (enm)	To shrink.
shrink	English (eng)	(intransitive) To become smaller; to contract.. (intransitive) To cower or flinch.. (intransitive) To move back or away, especially because of fear or disgust.. (intransitive, figuratively) To withdraw or retire, as from danger.. (transitive) To cause to become smaller.. (transitive) To draw back; to withdraw. (slang, sometimes, pejorative) A psychiatrist or therapist; a head-shrinker.. [...]