gawk

From a variant of gowk, from Middle English gowke, goke, from Old Norse gaukr (“cuckoo”), from Proto-Germanic *gaukaz (“cuckoo”). Cognate with Danish gøg, Swedish gök, German Gauch, Old English ġēac.

Compare also French gauche, and English gawky and gallock.

Perhaps from English dialectal gaw (“to stare; gawk”) +‎ -k