thickhead

Mane (Îngilîzî)

1. (informal) A stupid person.
2. Any of several species of Australian songbirds of the genus Pachycephala.

Hevwate

block-head

dim-wit

beefhead

whistler

hardhead

knucklehead

loggerhead

slab

paving-stone

blockhead

cabbage head

bonehead

duffer

dumbbell

Werger

allocco

Dummkopf

stupido

còdol

Kopfstein

Katzenkopf

Pflasterstein

χοντροκέφαλος

enclume

patate

pavé

ahuri

ahurie

benêt

μπουμπούνας

Etîmolojî (Îngilîzî)

Hevwate bi frîsî: dikharsens

In summary

From thick + head. Compare West Frisian dikharsens (“blockhead”, literally “thick brain”).