Wiktionary
noninterest
a. Not of or pertaining to interest (additional amount repaid as a fraction of money or goods borrowed).
Usage examples of "noninterest".
They studied him openly, affecting an air of noninterest but unable to hide their fascination, the sort of fascination one normally reserved for the snake house at the zoo.
It was an expression of noninterest that bordered on the insulting, but he displayed no reaction.