Diametrically opposed and Stiff-necked

Stiff-necked and diametrically opposed are semantically related. In some cases you can use "Stiff-necked" instead an adjective phrase "Diametrically opposed".

Stiff-necked adjective - Having a feeling of superiority that shows itself in an overbearing attitude.

Diametrically opposed and stiff-necked are semantically related. Sometimes you can use "Diametrically opposed" instead an adjective phrase "Stiff-necked".