noun, noun which may take the genitive case particle 'no'
Used primarily in medical contexts to describe tumors, conditions, or growths that are not harmful. Also used figuratively for non-threatening situations or qualities.
検査の結果、腫瘍は良性だとわかった。
The test results showed that the tumor was benign.
このソフトウェアのバグは良性で、データに影響はない。
This software bug is benign and does not affect the data.
良性 means 'benign' (not cancerous or dangerous), the direct medical opposite of 悪性 'malignant'.
benign tumor
aplastic anemia
geographic tongue; benign migratory glossitis
benign paroxysmal positional vertigo; BPPV
Compound of 良 (good) and 性 (nature/quality), literally 'good nature'. The term is a direct translation of the English medical term 'benign'.