θοός (θέω): swift, quick; of night,
‘swift - descending,’ because night in the
countries of the Mediterranean follows the setting of the sun more
speedily than with us (cf. Od. 2.388);
θοαὶ νῆσοι, islands ‘swiftly
flitting by’ and sinking in the horizon, Od. 15.299.— Adv., θοῶς.