Is there a reason for the usage of "geltose" for helmet vs "gelti" here? I personally can't tell but maybe I'm just having a brain fart idk
v. C-fin. to owe +inst: the thing owed; +acc: the person to whom it is owed.
Dāervose jevosy yne enkot daor. — You do not owe me your freedom.
In the instrumental:
The 4th declension lunar noun gelte becomes geltose.
The 2nd declension lunar noun somby becomes sombomy.
[With the -y lengthened in the given sentence to indicate the meaning and.]
And it is in fact the pronoun yne me that is in the accusative: https://wiki.dothraki.org/High_Valyrian_Pronouns#Personal_pronouns
Which cases some verbs cause the nouns around them to take is not always obvious.
Hmm ... that makes it a good verb with which to practise the instrumental case: Yne zaldrīzose enkā!