[2] tǫmðum ‘accustomed’: This is the m. dat. sg. of tam(i)ðr, adjectival p. p. of temja ‘tame, train, accustom’. Here the gen.-case gunnar ‘battle’ specifies to what Búi is accustomed, though a phrase using við ‘to’ would be more usual with temja, tam(i)ðr; see NS §136 for comparable constructions of adj. + gen.