noun A noun is a person, place, thing, or idea. In this case, 'unknown' can also be used as a noun to refer to something that is not known or identified.
adjective An adjective describes or modifies a noun or pronoun. In this case, 'unknown' describes something that is not known or familiar.
adverb An adverb modifies a verb, adjective, or another adverb. 'Unknown' can also be used as an adverb to describe something that is not known or understood.
Used to describe a condition or illness when the cause is not known
Used to describe celestial objects or phenomena that have not been identified or classified
Used to refer to a value or data that is not specified or known
Used to refer to an unidentified person or body
In the context of a mystery novel, the identity of the killer may remain unknown until the final chapters.
A psychologist may encounter patients with unknown backgrounds or traumas that require careful exploration and analysis.
A detective's job is to solve cases with unknown suspects and motives, using evidence and investigative techniques.
In scientific research, there may be unknown variables or factors that require further study and experimentation to understand.
A medical doctor may encounter patients with unknown symptoms or illnesses that require diagnosis and treatment.