Arduous vs. Assiduous

Arduousadjective

Needing or using up much energy; testing powers of endurance.

Arduousadjective

(obsolete) burning; ardent

Arduousadjective

Difficult or exhausting to traverse.

Arduousadjective

Steep and lofty, in a literal sense; hard to climb.

Arduousadjective

Attended with great labor, like the ascending of acclivities; difficult; laborious; as, an arduous employment, task, or enterprise.

Arduousadjective

characterized by toilsome effort to the point of exhaustion; especially physical effort;

Arduousadjective

taxing to the utmost; testing powers of endurance;

Arduousadjective

difficult to accomplish; demanding considerable mental effort and skill;

Arduousadjective

involving or requiring strenuous effort; difficult and tiring

Assiduousadjective

Hard-working, diligent or regular (in attendance or work); industrious.

Assiduousadjective

Constant in application or attention; devoted; attentive; unremitting.

Assiduousadjective

Performed with constant diligence or attention; unremitting; persistent; as, assiduous labor.

Assiduousadjective

marked by care and persistent effort;

Assiduousadjective

showing great care and perseverance