"boneheaded" in German boneheaded dumm Detailed translations for "boneheaded" boneheaded boneheaded(also: ignorant, dim-sighted, blockheaded, fatheaded) dumm{adjectiv} English synonyms for "boneheaded" boneheaded {s} blockheaded duncical duncish fatheaded loggerheaded thick thick-skulled thickheaded wooden-headed