摸不着头脑

Traditional (Taiwan): 摸不著頭腦

mōbuzháotóunǎo ㄇㄛ ˙ㄅㄨ ㄓㄠˊ ㄊㄡˊ ㄋㄠˇ

    • to be unable to make any sense of the matter
    • to be at a loss

Character by character

Sources