a. Obs. rare1. [f. ENDEAVOUR sb. + -OUS.] Full of endeavor, zealous, forward. Hence † Endeavourously adv.
1597. Beard, Theatre Gods Iudgements, 48. Whilst hee thus strongly and endeauourously emploied himself about these affaires.
a. 1631. Donne, Ess. Divinity (1651), 28. For no man was euer more endeavourous than he.