effortful

Từ điển WordNet v3.1 - WordNet Dictionary

adjective

requiring great physical effort
• Ant:
effortless
• Similar to:
arduous, backbreaking, grueling, gruelling, hard,
heavy, laborious, operose, punishing, toilsome, dragging,
exhausting, tiring, wearing, wearying, labored, laboured,
laboured, labour-intensive, leaden, plodding, Sisyphean,
straining, strenuous
• See Also:
difficult, hard
• Derivationally related forms:
effortfulness