Umbrean does not posses any direct adverbs but tends to use different constructs or postpositional phrases to achive it
To for example say "coal black tooth" one start with "Tjygniuvö döndiudh" meaning "Black tooth" and use a postpositional phrase with the postposition "Djin" which means "To the extent of" in accordance to normal postpositional phrase infront of the adjective.
Dhañiovü djinölü tjygniuvö döndiudh Dhañiovü djinölü tjygniuvö döndiudh Coal
To the extent of
Black Tooth Coal Black Tooth
Not that hard, there are various other ones for other puproses but this establishes the general idea