noun
priapism
Medical term for a persistent, often painful erection not caused by sexual arousal. Used in clinical contexts.
持続勃起症は、早急な治療が必要な状態です。
Priapism is a condition that requires urgent treatment.
Compound of 持続 (persistent), 勃起 (erection), and 症 (condition/syndrome). The exact historical derivation is uncertain; the spelling is conventionally associated with the medical meaning.