Real is an adjective. It would only colloquially be an adverb meaning "very."
(e.g. I'm real sorry / That dog is real mean. / He's hurt real bad)
adjective
Nervous is an adjective. The adverb form is nervously.
Comprehensible is an adjective. The adverb is comprehensibly.
Silently is an adverb. The adjective is silent.
Lively can be used as an adjective and an adverb. Adjective: a lively discussion Adverb: step lively
Adjective
It can be an adjective. The colloquial meaning (very) is an overused adverb.
adjective
No, "fake" is not an adverb. It is commonly used as an adjective to describe something that is not genuine or real.
Dark can be an adjective or a noun. Darkly is an adverb.
Adverb.Here is an adverb, not an adjective.
its an adverb an adjective is a descriptive word an adverb is a feeling
An adverb describes a verb, an adjective or another adverb.
It can be an adjective OR an adverb. adjective -- You dog is a friendly dog adverb -- She always talks friendly to me
"Shyly" is an adverb. It is used to describe how someone is behaving in a timid or bashful manner.
Nervous is an adjective. The adverb form is nervously.
Yes, "especially" can function as both an adverb and an adjective. As an adverb, it modifies a verb, an adjective, another adverb, or a sentence. As an adjective, it describes a noun.