Gruelling
Part of speech: adjective
Definition: So difficult or taxing as to make one exhausted; backbreaking.
Hard
Part of speech: noun
Definition: A firm or paved beach or slope convenient for hauling vessels out of the water
Part of speech: adverb
Definition: With much force or effort.With difficulty.Compactly.
Part of speech: adjective
Definition: Resistant to pressure.Requiring a lot of effort to do or understandDemanding a lot of effort to endure., severe, harsh, unfriendly, brutal.Unquestionable.Of drink, strong.Having a comparatively larger or a ninety-degree angle.Of water, high in dissolved calcium compounds.Sexually aroused.Having muscles that are tightened as a result of intense, regular exercise.Of a ferromagnetic material, having the capability of being a permanent magnet by being a material with high magnetic coercivity (c.f. soft)
Example sentence: There is no substitute for hard work.