Key: "S:" = Show Synset (semantic) relations, "W:" = Show Word (lexical) relations
Display options for sense: (gloss) "an example sentence"
Adjective
S: (adj) arduous, backbreaking, grueling, gruelling, hard, heavy, laborious, operose, punishing, toilsome (characterized by effort to the point of exhaustion; especially physical effort) "worked their arduous way up the mining valley"; "a grueling campaign"; "hard labor"; "heavy work"; "heavy going"; "spent many laborious hours on the project"; "set a punishing pace"