Backbreaking - Definition

adj 1: 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" [syn: arduous,
backbreaking, grueling, gruelling, hard, heavy,
laborious, operose, punishing, toilsome]