adj. Function: adjective
Synonyms: HARD 6, arduous, difficult, effortful, heavy, labored, operose, strenuous, toilsome, uphill
Antonyms: easy, effortless
adj. Function: adjective
Synonyms: HARD 6, arduous, difficult, effortful, heavy, labored, operose, strenuous, toilsome, uphill
Antonyms: easy, effortless
Merriam Webster. Collegiate thesaurus English dictionary. Английский энциклопедический толковый словарь тезауруса. 2012