unbeknown
I saw the above word in the dictionary listed as an adjective. I understand it's meaning but find it hard to understand it's parts of speech, how do I know that it's an adjective and not a noun.
Example sentence:
Unbeknown to her they had organized a surprise party.
Oxfordadvancelearners
noun –n. 1. any member of a class of words that are formally distinguished in many languages, as in English, typically by the plural and possessive endings and that can function as the main or only elements of subjects or objects, as cat, belief, writing, Ohio, darkness.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
noun
–n.
1. any member of a class of words that are formally distinguished in many languages, as in English, typically by the plural and possessive endings and that can function as the main or only elements of subjects or objects, as cat, belief, writing, Ohio, darkness. Nou