requiring great exertion; laborious; difficult: an arduous undertaking.

What is an arduous mean?

arduous \AHR-juh-wus\ adjective. 1 a : hard to accomplish or achieve : difficult. b : marked by great labor or effort : strenuous. 2 : hard to climb : steep.

What does the word arduous mean in the Bible?

deep, difficult to climb: difficult to accomplish: laborious.