If you mean nap as in a short, light sleep, it comes from an Old English word Hnappian. There is also a connection to the German word Napfen
It depends on how the word is used.
catnap knapsack
It is siesta (from the Spanish custom).
After a nap he felt energized.
Slap, map all i got
In Punjabi, the word for nap is "ਝੱਪੀ" pronounced as "jhappi".
wrap
nap
It depends on how the word is used.
nap
Nap.
catnap knapsack
It's a nap. Some people refer to them as catnaps if they are really really short, but the more common word in just nap.
The word is siesta (from Spanish).
"Siesta" refers to a nap, usually after lunch.
No, it is not an adverb. Napping is a verb form, and gerund (noun). There is no related adverb form.
Nap