interrogative or correlative particle: by what; by whom; by which Comment: Used often as a correlative with de.
1) by what / which, because of what. {sman gang gis nad 'di la phan gyi red} What medicine will be good for this illness? 2) whatever. {gang gis thon skyed che ru 'gro thub pa dril bsgrags byas pa red} (They) publicized how to increase production.3) of / from what. {'di gang gis bzos pa red} What is this made from?