■ In its broadest sense, Ｈ (or エッチ or えっち) refers to erotic matters of any kind, especially sexual expressions or feelings that are particularly blatant. English equivalents might include "lewd," "sexual," "dirty," "kinky," "horny," etc.
□ According to dictionaries, the word Ｈ comes from the initial of the word 変態（へんたい） when written in romaji (hentai). Although the meaning of 変態 is "sexual perversion," Ｈ does not necessarily refer to perverted sex. A closer synonym to Ｈ than 変態 is いやらしい. (There seems to be some uncertainty about this 変態 etymology, and one reference mentions 変質者（へんしつしゃ） "pervert" as another possible origin.)
In this broad sense, the word dates at least to the mid-1950s, as 性語辞典 has a citation from 週刊読売 in 1955. According to other slang dictionaries, prewar meanings of Ｈ included "husband" and "homosexuality," though these do not seem to be current any longer and it is not clear whether or not they inspired the current meaning of Ｈ.
◇ あたしがえっちな本を隠（かく）してることは夫（おっと）は知（し）ってるし。(Web, July 2000)
My husband knows that I have some lewd books hidden away...
仕事（しごと）が忙（いそが）しくてなかなかＨな気分（きぶん）にならなかった。(Web, July 2000)
I was so busy with work that I was never in the mood for sex.
報告とか近況でも良いですしＨな相談もＯＫですので、送って下さいね。(Web, July 2000)
Send in reports or tell us what you've been doing. Requests for advice about sex are okay, too.
今度は、「Ｈな人は好きですか？」って質問されてしまった。「Ｈな男性と、Ｈでない男性がいたら、どっちを選びますか？」って。う〜ん、何の意味があるんだ〜、この質問。Ｈでない男性っているのかな？(Web, July 2000)
2. sexual act
■ In this narrow sense, Ｈ means to perform a sex act, whether sexual intercourse between two persons, masturbation, or whatever other variations one might imagine.
□ According to 性語辞典, this sense is more recent, dating to the 1980s. Although it has become very common, it does not seem to have made it into mainstream dictionaries as of 2000.
◇ エッチするならこの女性(Web, July 2000)
Women you would like to have sex with
風邪なおらん。エッチしすぎ？(Web, July 2000)
I'm still not over my cold. Too much screwing around?
みーちゃんはなにする？浮気する？一人でえっちする？(Web, July 2000)
そういえば近頃Ｈしても筋肉痛にはならへんなぁ。そんな激しいことしてないからかなぁ。(Web, July 2000)
旅行に行きたいとか、アクセサリーが欲しいとか、買い物が多い。この他に「Ｈして〜、Ｈして〜」としつこくおねだりする事も有る。(Web, July 2000)
This entry was created by Tom Gally.