- laborious, often, tediously so
- very busy; industrious
Origin of operoseClassical Latin operosus from opus (gen. operis), work: see opus
- Involving great labor; laborious.
- Industrious; diligent.
Origin of operoseLatin operōsus from opus oper- work ; see op- in Indo-European roots.
(comparative more operose, superlative most operose)
From Latin operÅsus.