ant bear: large shaggy-haired toothless anteater with long tongue and powerful claws; of South America
anteater: any of several tropical American mammals of the family Myrmecophagidae which lack teeth and feed on ants and termites
preposition: a function word that combines with a noun or pronoun or noun phrase to form a prepositional phrase that can have an adverbial or adjectival relation to some other word