Skip to definition.
Get the FREE one-click dictionary software for Windows or the iPhone/iPad and Android apps

Adjective: operose  'ó-pu,rows
  1. Characterized by effort to the point of exhaustion; especially physical effort
    "worked their operose way up the mining valley";
    - arduous, backbreaking, grueling [US], gruelling [Brit, Cdn], hard, heavy, laborious, punishing, toilsome, killing [informal]

See also: effortful