It is the past tense of the verb "believe".
The fact that she supplied intricate details made her story quite believeable.
Clayton Moore Played the part much better and more believeable than John Hart.
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
Strong believeable
The word believe does not have a prefix.
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.