arduous - adjective
arduous - thesaurus
backbreaking grueling gruelling hard heavy laborious operose punishing straining strenuous toilsome
Scrabble score = 8
generated at 02:43:20 on 16-08-24
"This is a fantastic opportunity for our students! I'm sure Spellzone will be invaluable in helping them to improve their spellings and therefore improve the quality of their writing in all subject areas!"
Teacher, High School, UK