Wouldn't "The Unsullied are powerful knights" be the original/most likely version, considering word order? Azantyssy is also plural and both are nominative, so I don't see any reason for a change... Can anyone clarify?
Gender is not it either AFAIK, since "azantys" is solar and the adjective ending for nominative solar/lunar seems to always be the same... I guess both should be accepted?
It actually IS gender, azantys is solar and dovaogēdis lunar, so the ending is different for both and -i is solar so it only worked for dovaogedi and if it were "powerful knights" it would be "kostobys azantyssy" (-ys ending) instead. Thank the Old Gods the endings are similar so we can usually quickly identify what word the adjective is attached to, even when case declension won't help!
Oh and just up clarify: the ending is the same between solar/lunar only for type II and III adjectives, not type I (so at least some memorization is in order, at least to form our own sentences, ofc), which "kostōba" belongs to.
In high valyrian, as far as i have observed, the verb at the end of the sentence is subjected to the first subject of statement and adjective is written just before the noun... Add up(fyi i also got confused initially)
Why "Mighty Unsullied are powerful knights."? Mighty+powerful = kostóbi.