[1] í gegn ‘in opposition’: Cf. the same phrase in st. 16/5. This is either an adverbial use of the prep. í gegn ‘against, towards, in return’ (see Fritzner: gegn 4), or an elliptical use, with an object such as ‘him’ or ‘the ruler’ implied (cf. Skj B imod (fyrsten) ‘against (the prince)’. The dat. variant skeiðum gives ‘against/towards warships’, but, being only attested in F, it is clearly secondary.