[1] þrýtr ‘disappears’: So B. The verb þrjóta ‘disappear, dwindle’ (þrýtr 3rd pers. sg. pres. indic.) is used impersonally with harðan harm ‘the strong grief’ as the acc. object. Þýtr ‘howls, resounds, whistles’ (so A, W) makes no sense in the context.