[All]: Antonomasia in this case occurs by an extrinsic comparison in the word sælan ‘fortunate one’ for the king (TGT 1927, 79): Hér er sæll settr fyrir nafni konungs, ok er svá óeiginlig liking, en sæla kemr af tilfellum, ok er hér hvarki eiginlig ǫnd né líkam. Þessa fígúru kǫllu vér njarðarvǫtt í skáldskap, ok er hon þó eigi með leyfum talið ‘Here “fortunate” is used instead of the king’s name, and it is thus an improper comparison, because fortune comes from circumstance and here does not belong to either mind or body. We call this figure “sponge” in poetry but it is not counted among the [poetical] licences’. The particular grammatical sense of the native term njarðarvǫttr ‘sponge’ is not otherwise attested. For njarðarvǫttr lit. ‘Njǫrðr’s mitten’ and, by extension of meaning ‘sea-mitten’ (glossing Lat. spongia), see Fritzner: njarðarvǫttr.