Greek word
sklērotráchēlos
σκληροτράχηλος
What it means
hardnaped, i.e. obstinate
hardnaped, i.e. (figuratively) obstinate
Where it comes from
from sklērós (σκληρός) and tráchēlos (τράχηλος)
How the King James translates it
Every place it appears 1
Acts7:51