Is greedily an adjective or adverb ?

Greedily is an Adjective 

Adjectives describe a noun or pronoun
Adverbs describe a verb, adjectives, or other adverbs ex. (how, when, where,why)

Adjective beacus look at the y thts a tip here is a The grassy field was wet with dew. – “Grassy” comes between an article (the) and a noun (field), so you know it’s an adjective.

Britishgovernment ohoman

Internal combustion engines