nonrecurring

[ non-ri-kur-ing, -kuhr ]
/ ˌnɒn rɪˈkɜr ɪŋ, -ˈkʌr /

adjective

not occurring or happening again, especially often or periodically.
noting or pertaining to an income or charge considered of a nature not likely to occur or happen again.

Origin of nonrecurring

First recorded in 1965–70; non- + recurring
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019