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Uncertain. Possibly an alteration or error of strenuous; alternatively, perhaps a new formation equivalent to strain + -eous.
Etymology from Wiktionary, CC BY-SA 4.0.
straineous
Today it means: Causing strain; strenuous. Full definition →
Today it means: Causing strain; strenuous. Full definition →
Uncertain. Possibly an alteration or error of strenuous; alternatively, perhaps a new formation equivalent to strain + -eous.
Etymology from Wiktionary, CC BY-SA 4.0.