Synonyms:
- a stranger to,
- asleep,
- caught napping,
- dead to,
- deaf to,
- impercipient,
- in ignorance of,
- incognizant,
- insensible,
- insensible to,
- lost to,
- mindless,
- napping,
- nonconceiving,
- not with it,
- oblivious,
- out of it,
- unaware,
- unaware of,
- unconscious,
- unconscious of,
- unhearing,
- uninsightful,
- unknowing,
- unmindful,
- unmindful of,
- unperceiving,
- unprehensive,
- unrealizing,
- unseeing,
- unsuspecting,
- unwitting,
- witless