noun-modifying (irregular)
non-matching; mismatched; inconsistent
Technical term used in computing, data processing, and formal contexts to describe things that do not match or are inconsistent. Often used attributively before nouns.
I will explain the method for detecting non-matching data.
In this system, mismatched records are automatically excluded.
non-identity operation
Formed from the negative prefix 非 and 一致 “agreement; match.” The reading ひいっち is the regular juxtaposition of ひ and いっち, without rendaku.