Synonyms for «arduous task»

difficult onerous strenuous grueling tedious tough rigorous laborious hard daunting complicated ambitious tricky intense vigorous burdensome considerable tremendous huge enormous formidable lengthy heavy painful tiresome immense delicate painstaking diligent complex herculean risky numerous cumbersome frustrating uphill intricate insurmountable hectic necessary overwhelming impossible high expensive rough great fierce important big

job challenge work assignment process chore difficulty mission effort goal project deal lot workload burden endeavor subject amount labor time skill bit responsibility hurdle battle thing step test undertaking exercise activities problems role struggle journey feat strain trip obstacles hands part hardship competition path game load demands experience schedule