Adjective.
Cloistered = a verb in the Past Participle.
"Cloistered" in the given sentence is a verb, part of the past tense in the passive voice of the verb "cloister". The complete verb is "were cloistered".
The highlighted word "cloistered" functions as a verb in the sentence. It describes the action of confining or isolating the animals in the ship's hold.
The part of speech that the word my is used as is an adjective.
The part of speech for this particular word is a noun.
The part of speech for the word civilian is English grammar.
The part of speech for the word diplomacy is a noun.
H is a letter, not a word. To be a part of speech, it needs to be a word.
The part of speech for the word "boulevard" is a noun.
open, free
The word speech is a noun.
It is not ANY part of speech, there is no such English word as "stroobly".