qashah (Hebrew #7185)
properly, to be dense, i.e. tough or severe (in various applications)
KJV usage: be cruel, be fiercer, make grievous, be ((ask a), be in, have, seem, would) hard(-en, (labour), -ly, thing), be sore, (be, make) stiff(-en, (-necked)).
Pronounce: kaw-shaw'
Origin: a primitive root
`oreph (Hebrew #6203)
the nape or back of the neck (as declining); hence, the back generally (whether literal or figurative)
KJV usage: back ((stiff-)neck((-ed).
Pronounce: o-ref'