arduo

Etymology
.

Adjective

 * 1) arduous
 * 2) difficult (of a problem)
 * 3) steep (of a slope)
 * 1) steep (of a slope)

Etymology
.

Adjective

 * 1) arduous
 * 2) difficult (of a problem)
 * 3) steep (of a slope)

Etymology
.

Adjective

 * 1) very difficult
 * 2) arduous
 * 1) arduous