Tied can be used as a verb (past tense of tie) and an adjective (a tied game).
Tied down is a phrasal verb, as in "He tied down the load and drove away." Tied down is the past tense of tie down.Tied is the past tense or past participle of the verb tie. Down is an adverb.
part of speech
The part of speech for this particular word is a noun.
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
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.
The part of speech of "came" is a verb.
The part of speech for "lecturer" is a noun.
The part of speech for "indefinite" is an adjective.