Ecchi
The word "ecchi" is etymologically derived from the Japanese pronunciation of the letter "H", the first letter of the word "hentai" (and is often written as such). In modern Japanese, the word is predominantly "sexual" in nature (akin to the English words "dirty" or "naughty"), carrying slightly negative connotations, but not necessarily "perverted" (which is usually reserved for the word "hentai").The word is often used in the context of manga and anime in Japan and the United States. However, its use in the United States is more general in its reference to something that would be considered "perverted" and carries different connotations than allowed for by the original Japanese.
Note that "ecchi" is an incorrect romanization—"etchi" is the correct one, though its usage is not nearly as widespread.
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