KanjiJLPT N1
Lewdness

lewdness, licentiousness

Mnemonic

During a wild storm, a swordsman stumbles out of a brothel with fresh claw marks raked down his bare back—undeniable proof of his lewdness. Every stormy night, this swordsman returns for more, and the claw scratches multiply like a shameful tally of his depravity.
Additional thoughts
Picture the storm setting the mood for sin, claw marks as physical evidence of passionate excess, and the swordsman as a skilled warrior who channels all his energy into debauchery instead of battle.
Quick recall
A swordsman emerges from a storm-lashed brothel with claw marks proving his lewdness.

Details

The keyword for 淫 is lewdness. This kanji refers to excessive sexual indulgence, licentiousness, or obscene and immoral behavior of a sexual nature. It carries strong connotations of debauchery, wantonness, and conduct that violates social or moral standards of decency. Beyond its sexual meaning, it can also broadly suggest excess or overindulgence in general.
On'yomi
いん
Kun'yomi
ひた.す、ほしいまま、みだ.ら、みだ.れる、みだり