Tied can be used as a verb (past tense of tie) and an adjective (a tied game).
"Tied" is a verb in the past participle form, while "down" is an adverb particle in this context explaining the action of tying. Together, they form a phrasal verb "tied down" which means to secure something firmly in place.
The part of speech for "answer" is a noun.
part of speech
The part of speech for this particular word is a noun.
what part of speech is beneath
adverb
what part of speech is work
The part of speech for "unfamiliar" is an adjective.
The part of speech for "explicit" is an adjective.
The part of speech for "buried" is a verb.
The part of speech for "breezy" is an adjective.
The part of speech for "lecturer" is a noun.