キーン;きーん;きいん /(adv,adv-to) (1) (on-mim) with a screech/with a whine/with a shrill/with a ringing (in the ears)/(adv,adv-to) (2) (See アイスクリーム頭痛) (on-mim) with a sharp pain (in the head or teeth after eating or drinking something cold)/getting a brain freeze/EntL2856962/