nāḥaš נָחַשׁ ‘to divine’ (Hebrew)

Etymology^?: a primitive root

nāḥaš v
1) to practice divination, divine, observe signs, learn by experience, diligently observe, practice fortunetelling, take as an omen
 1a) (Piel)
  1a1) to practice divination
  1a2) to observe the signs or omens