Þrohtig

According to the Old English Dictionary:

(?);

þrohtig

adj. Enduring, firm, persevering, laborious :-- Ðrohtig (in the MS. e is written over o) pervicax, Txts. 87, 1556. Ic eom swiftre ðonne hé, þrágum strengra, hé þreohtigra, Exon. Th. 494, 7; Rä. 82, 4. [Cf. Icel. þróttigr powerful.] þrohtig