Where does “դրուատեմ” come from?

դրուատեմ (Old Armenian) comes from Old Armenian դրուատ, from Old Persian druwatā-, from Old Persian 𐎯𐎢𐎽𐎢𐎺, from Proto-Iranian *druwáh, from Proto-Indo-Iranian dʰruwás, from Proto-Indo-European dʰru-wó-s, from Proto-Indo-European -wós — Creates adjectives from verb stems.

դրուատեմ (Old Armenian): to praise, to give praises, to celebrate