FROM STRONG’S GREEK DICTIONARY (1890)

Strong’s Greek Dictionary (1890) — public domain, printed whole.

sklerotrachelos σκληροτράχηλος — sklay-rot-rakh'-ay-los — from 4642 and 5137; hardnaped, i.e. (figuratively) obstinate:--stiffnecked.

see GREEK for 4642

see GREEK for 5137