The word down is an adverb. It means from a higher position to a lower one.
The part of speech for this particular word is a noun.
The part of speech for "answer" is a noun.
The part of speech for "explicit" is an adjective.
The part of speech for "twirl" is a verb.
The part of speech for "unfamiliar" is an adjective.
Verb
An adverb.
"lay" is a verb and "down" is an adverb.
It is a pronoun.
"lay" is a verb and "down" is an adverb.
PREPOSITION
A Sentence for trotted is - The horse trotted down the road or field
Verb
Conjunction
yes
Down in your sentence is an adverb telling where.
Alight is a verb. It means to go down or step down which means you would have to create action.