STRENUOUS, STRENUOUSLY
ADJECTIVES
1000 ► DEAR → DERE brave, bold, strenuous, hardy → obs.
1000 ► ORPED bold, brave, valiant, stout, strenuous → obs.
1297 ► EAGER strenuous, ardent, impetuous; fierce, angry, furious → obs. exc. Eng. dial.
1663 ► SINEWOUS strenuous, vigorous
1885 ► TEARING active, energetic; strong, strenuous → Sc. & Eng. dial.
ADVERBS
1632 ► OBNIXIOUSLY earnestly, strenuously → obs.
1641 ► OBNIXELY earnestly, strenuously → obs.
Lexicophilia 