エイチ・Ｈ・ｈeichi

1. nounH; h
2. na-adjective, nounindecent; lewd; sexy; dirty; obscenefrom 変態
   ちなみにここ一いち週間しゅうかんは、例たとえばフラグが立たっていようとも、Ｈシーンが無ない事ことは確定かくてい事項じこうだからな。暫しばらくの間あいだ、辛抱しんぼうな！↗

   By the way, this week - no matter what flags are set - it's a certainty that there will be no ecchi scenes. You'll just have to bear with it a while.

   私よりもっとエッチな人ひともいて安心あんしんしました。↗

   I was relieved that there are people more wanton than me.
3. noun, suru verb, intransitive verb(having) sex
   女性じょせいだってエッチしたい。↗

   Women want to have sex too.
4. nounpervert
5. prefixnth year in the Heisei era (1989.1.8-2019.4.30)
6. nounhour
7. nounhydrogen (H)
8. noun, golfhole

• RelatedいやらしいCasualColloquial; covers both 'unpleasant' and 'lewd', and carries open disgust, making it blunter than 「エッチ」.
• RelatedはしたないNeutralDescribes improper, unrefined behavior or manners; it points to a lapse in decorum rather than to anything sexual.
• Related色っぽいいろっぽいNeutralDescribes charm that attracts the opposite sex, said mostly of women; it is not derogatory, unlike the lewd 「エッチ」.
• RelatedエロCasualColloquial loanword abbreviation for 'erotic'; blunter and more explicit than 「エッチ」.
• Related下品げひんNeutralMeans vulgar and lacking in refinement; it judges taste rather than sex, so it does not specifically mean lewd.
• Related低俗ていぞくNeutralLowbrow and trashy; often said of shows or content, and about vulgarity rather than sex.
• RelatedエロチックNeutralLoanword meaning erotic, arousing sexual interest; more formal than 「エッチ」 and seldom used in jest.
• RelatedセクシーNeutralLoanword for 'sexy', usually said as a compliment; unlike 「エッチ」, which is teasing or negative.
• Related卑猥ひわいWrittenA written, formal word for lewd or obscene speech and behavior; harsher in tone than the playful, colloquial 「エッチ」.
• Related淫らみだらWrittenWritten word for sexual wantonness or immodesty; much heavier and more serious than 「エッチ」.
• RelatedわいせつWrittenFormal, legal term for obscenity, as in 「猥褻物」; serious in tone and never used in jest, unlike 「エッチ」.
• RelatedいかがわしいNeutralMeans suspicious or disreputable, sometimes with a seedy sexual shade, as in 「いかがわしい店」; not limited to sexual matters.
• Related淫猥いんわいWrittenRare written word for obscenity and lewdness; far more serious in tone than 「エッチ」.
• Related官能的かんのうてきWrittenWritten word for sensual, fleshly appeal that stirs the senses; more refined than 「エッチ」.
• Related俗悪ぞくあくWrittenWritten word for vulgar, tasteless content; it targets poor style rather than sex.
• Related低級ていきゅうNeutralMeans low-grade or low-class and is used very broadly; not specifically about sex.

For playful, colloquial talk about anything lewd or sexy, use 「エッチ」, as in 「エッチな話」. Say it bluntly with 「エロ」. In written or formal prose choose 「卑猥」 or 「猥褻」. Use 「いやらしい」 when you feel disgust, and 「セクシー」 for sexiness meant as a compliment.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. ラテンアルファベットの第だい8字じ。エイチ。
2. 性欲せいよく又または性的せいてきなものへの関心かんしんが非常ひじょうに強つよいこと又またはその人ひと。1960年ねん代だい（昭和しょうわ30年ねん代だい）頃ころから用もちいられたが、その後あとは使用しよう例れいが減へっている。
3. 性行為せいこうい、性交渉せいこうしょう。
4. 性行為せいこういをする。性交渉せいこうしょうをする。
5. 性欲せいよく又または性的せいてきなものへの関心かんしんが非常ひじょうに強つよいさま。
6. 性的せいてきな魅力みりょくがあるさま。
7. 夫おっと。既婚きこん男性だんせい。