It's a verb. You ponder something--an idea, suggestion, problem, thought, something like that. It means to think hard about it, usually for a while.
adverb
There is no root in "ponder"
what part of speech is beneath
i want to know what part of speech is camping
The part of speech is a adjective
The part of speech for this particular word is a noun.
part of speech
The part of speech for "answer" is a noun.
what part of speech is beneath
adverb
ponder meaning
Careful not to provoke the hippos, I made my way between the ponderous beasts. His audience was obviously tired by the end of his ponderous speech.
The part of speech for "explicit" is an adjective.
The part of speech for "lecturer" is a noun.
The part of speech for "rapid" is an adjective.
The part of speech of "came" is a verb.
The part of speech for "breezy" is an adjective.