arduous arduinite • arduously · · · Info · Synonyms · Characters · · arduous · · Text Latin · · Script 7 · · Length Synonyms · · · backbreaking · · Synonym 1 grueling · · Synonym 2 gruelling · · Synonym 3 hard · · Synonym 4 heavy · · Synonym 5 laborious · · Synonym 6 operose · · Synonym 7 punishing · · Synonym 8 toilsome · · Synonym 9 straining · · Synonym 10 strenuous · · Synonym 11 Characters · · a latin small letter a U+0061 d latin small letter d U+0064 o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 u latin small letter u U+0075