adj. Function: adjective
1
Synonyms: VIGOROUS , dynamic, energetic, lusty, red-blooded, ||survigrous, vital
2
Synonyms: HARD 6, arduous, difficult, effortful, laborious, operose, toilful, toilsome, tough, uphill
Related Words: breathless, energy-consuming; mean, wicked; Herculean
Idioms: a long hard pull, an uphill climb, tough going
Contrasted Words: comfortable, cushy, light, unburdensome
Antonyms: effortless