unrealised

un- +‎ realised

unrealised (not comparable)

1. (British spelling) Alternative spelling of unrealized
   • 1941 July, Cecil J. Allen, “British Locomotive Practice and Performance”, in Railway Magazine, page 300:

     [...] a reminder of how many factors, unknown to or unrealised by the passenger in the train, may be having their effect on its running. ("not realised" may have been better here)

• “unrealized”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022.

• neuralised