noun, noun which may take the genitive case particle 'no'
irregularity; unevenness; asymmetry; lack of uniformity
Describes a state of being not uniform, not equal, or not symmetrical. Often used in formal or technical contexts, such as describing shapes, surfaces, or distributions.
This terrain is irregular, with few flat areas.
An uneven distribution can be seen in the data.
uneven ground; broken terrain
Standard kanji form for 'irregularity' or 'asymmetry'. 斉 means 'equal' or 'uniform'.
Alternate kanji form. 整 means 'order' or 'arrangement', emphasizing lack of order rather than lack of equality.
Compound of 不 (fu, 'not') and 斉 (sei, 'equal' or 'uniform'). The spelling 不整 uses 整 (sei, 'order') instead, with a similar meaning. The exact historical derivation is uncertain, but the word follows a common Sino-Japanese pattern of negation.