English | Synonym |
---|---|
arduous adjective | backbreakingadjective difficultadjective effortfuladjective gruelingadjective gruellingadjective hardadjective heavyadjective laboriousadjective operoseadjective punishingadjective strainingadjective strenuousadjective toilsomeadjective |
arduousness noun | effortfulnessnoun strenuousnessnoun |