Hard to please and Operose

Hard to please adjective - (of persons) "his father was a hard-to-please taskmaster".

Operose and hard to please are semantically related. In some cases you can use "Operose" instead an adjective phrase "Hard to please".

Operose adjective - Characterized by effort to the point of exhaustion; especially physical effort.

Hard to please and operose are semantically related. Sometimes you can use "Hard to please" instead an adjective "Operose".