The word aptly is an adverb.
You can easily spot adverbs as most of them end in the suffix -ly.
The word "aptly" is the adverb form of the word "apt. " An example of a sentence using the word "aptly" is "I heard your comment to the supervisor, it was very aptly put. "
The part of speech for this particular word is a noun.
part of speech
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
The part of speech for "unfamiliar" is an adjective.
The part of speech of "came" is a verb.
The part of speech for "twirl" is a verb.
The part of speech for "explicit" is an adjective.
The part of speech for "indefinite" is an adjective.
The part of speech for "lecturer" is a noun.