A Dictionary of the Older Scottish Tongue (up to 1700)
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First published 1983 (DOST Vol. V).
This entry has not been updated since then but may contain minor corrections and revisions.
Operous, a. [L. operōs-us, and cf. e.m.E. operose (1670), operous (1641).] Laborious, tedious. —1653 Vindication of the Late Generall Assembly 100.
His long and operous disputation gives his readers occasion to think that [etc.]