noun which may take the genitive case particle 'no', na-adjective, noun
uneven; irregular; non-uniform; incomplete (set)
Describes things that are not uniform in size, shape, quality, or composition; often used for sets or collections that are incomplete or mismatched.
These socks are uneven in size.
Collecting mismatched plates is my hobby.
The deck of cards is incomplete; some are missing.
Standard kanji spelling.
Kana spelling is common in everyday writing.
Search-only kanji form; 揃い is the standard character.
Compound of 不 (fu, 'not') + 揃い (zoroi, 'uniformity, completeness'), the noun form of 揃う (sorou, 'to be complete, uniform').