un·aware 
/ˌʌnəˈweɚ/ adjective
/ˌʌnəˈweɚ/ adjective [more unaware; most unaware] : not having knowledge about something : not aware — often + that ▪ They were unaware that they were being watched. — often + of ▪ We were unaware of the problem. ▪ She seemed unaware of what was going on.
— un·aware·ness noun [singular, noncount]
▪ He claimed unawareness of the problem.
▪ He claimed unawareness of the problem.
