斑
むら · mura · JLPT N1 · noun
unevenness
🐄 Moo-ra: a cow's patchy coat is uneven, which is what むら and 斑 describe
斑 means spotted or mottled, with marks scattered rather than even. That uneven scatter is the core sense of むら, so the same word also covers inconsistency and irregularity.