Synonym word of difficult:
Gargantuan, Herculean,ambitious,arduous, backbreaker, bothersome,burdensome, challenging,crucial,demanding, difficile, easier said than done, effortful,exacting,formidable, galling, hard-won,heavy,immense,intricate,irritating, labored,laborious, no picnic
Gargantuan, Herculean,ambitious,arduous, backbreaker, bothersome,burdensome, challenging,crucial,demanding, difficile, easier said than done, effortful,exacting,formidable, galling, hard-won,heavy,immense,intricate,irritating, labored,laborious, no picnic