þreytir (noun m.) ‘destroyer, wager, tester...’

• Ótt Hfl 18^I/1 — þreytir ‘Wager’1023
• Arn Hryn 17^II/3 — þreytir ‘destroyer’1046
• ESk Eystdr 1^II/5 — þreytir ‘the tester’1158

elements in compounds

• SnSt Ht 32^III — Seimþreytir ‘gold-destroyer’ 1221