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"
例句
用作形容词(adj.)
Digging the garden is a backbreaking job.翻整花园的地是件累人的活。
