effortful

1. Requiring great physical effort (synset 300839816)
   also: difficult, hard - not easy; requiring great physical or mental effort to accomplish or comprehend or endure
   similar to:

   • arduous, backbreaking, grueling, gruelling, hard, heavy, laborious, operose, punishing, toilsome - characterized by effort to the point of exhaustion; especially physical effort
   • dragging - marked by a painfully slow and effortful manner
   • exhausting, tiring, wearing, wearying - producing exhaustion
   • heavy, labored, laboured - requiring or showing effort
   • labor-intensive, labour-intensive - requiring a large expenditure of labor but not much capital
   • leaden, plodding - (of movement) slow and laborious
   • sisyphean - both extremely effortful and futile
   • arduous, straining, strenuous - taxing to the utmost; testing powers of endurance

Other Searches

• Rhyme: Dillfrog, RhymeZone
• Definition: Wiktionary, Dictionary.com, Wikipedia, Merriam-Webster, WordNet, Power Thesaurus
• Imagery: Google, Flickr, Bing