General Synonyms:
* Ignorant: This implies a lack of knowledge or information.
* Uninformed: This suggests a lack of knowledge about a specific topic or situation.
* Unconscious: This implies a lack of awareness of one's surroundings or self.
* Oblivious: This suggests a complete lack of awareness.
* Insensitive: This implies a lack of awareness of the feelings of others.
* Unaware: This is the most neutral synonym, simply meaning not aware.
More Specific Synonyms:
* Unknowing: This implies a lack of knowledge about something specific.
* Unperceiving: This suggests a lack of ability to notice something.
* Unsuspecting: This implies a lack of suspicion or apprehension.
* Naive: This suggests a lack of experience or worldly knowledge.
The best synonym to use will depend on the specific situation and the nuance you want to convey.