the.com/uneven
When reality refuses to lie flat and your level just gives up.
means Not smooth, equal, or balanced — varying in surface, quantity, or quality from one part to another.
from Old English unefen, simply un- plus efen (even, level), so literally not-level since the Anglo-Saxons.
odd numbersOld usage called odd numbers uneven ones.
sports stapleUneven bars are gymnastics; uneven contests are heartbreak.
hidden mathEven derives from efen, meaning equal or flat.