エロero

1. na-adjective, nounerotic; pornographic; obscene
2. noun (prefix)perverted; horny; dirty

• SynonymエロチックNeutralNeutral loanword for erotic and alluring, with a literary flavour; 「エロ」 is its colloquial short form and more blunt.
• SynonymエロいCasualColloquial adjective meaning erotic or sexy; synonymous with 「エロ」 but even more casual in use.
• SynonymセクシーNeutralNeutral loanword for sexy and attractive, usually complimentary; 「エロ」 leans blunt and dirty.
• Synonym卑猥ひわいWrittenWritten/formal prose. Means indecent and vulgar with a disapproving, critical tone; 「エロ」 is colloquial and can be neutral or teasing.
• Synonym淫らみだらWrittenWritten/formal prose. Suggests sexual wantonness or impropriety and carries moral condemnation; colloquial 「エロ」 is far milder.
• SynonymわいせつWrittenWritten/formal prose and the legal term for obscenity, as in 「猥褻物」; serious in tone, whereas 「エロ」 is casual slang.
• Synonym淫猥いんわいWrittenWritten/formal prose, rare even in writing; means obscene and filthy with a critical tone. 「エロ」 is a light colloquial term.
• Synonym淫靡いんびWrittenWritten/formal prose for lewd, decadent atmospheres or mores; stresses ambience. 「エロ」 is blunt colloquial speech.
• Related色っぽいいろっぽいNeutralNeutral. Describes (mostly women) as seductive and alluring, fairly understated; 「エロ」 is more direct.
• Related好色こうしょくWrittenWritten/formal prose for lechery, of people or things like 「好色な視線」「好色文学」; 「エロ」 is the colloquial option.
• Related挑発的ちょうはつてきNeutralNeutral. Means provocative, also suggestive in a teasing way; not limited to sex, while 「エロ」 is strictly erotic.
• Related淫蕩いんとうWrittenWritten/formal prose for debauchery, indulgence in drink and sex; concerns one's conduct. Colloquial 「エロ」 describes content or people.
• Related淫奔いんぽんWrittenWritten/formal prose for sexual wantonness, rare even in writing; everyday speech prefers 「淫ら」, casual talk 「エロ」.
• Related淫乱いんらんWrittenWritten/formal prose for sexual excess, heavy and pejorative; colloquial 「エロ」 can be said in jest.
• Related官能的かんのうてきWrittenWritten/formal prose for sensual, flesh-appealing qualities, common in literary criticism; more refined than 「エロ」.
• Related肉感的にっかんてきWrittenWritten/formal prose for voluptuous bodies or graphic, arousing description, as in 「肉感的な体つき」; more refined than 「エロ」.
• Antonym清純せいじゅんNeutralNeutral. Purity and innocence, often describing a woman's image; the opposite of 「エロ」 in sexual terms.
• Antonym非エロCasualColloquial opposite of 「エロ」, for content free of erotic material; not a fixed expression.

Colloquially, 「エロ」 and 「エロい」 are your default for anything erotic or dirty. To compliment attractiveness, use 「セクシー」 or 「色っぽい」. Legal obscenity is 「猥褻」; written or literary contexts take 「卑猥」「淫ら」「官能的」「肉感的」 and similar; 「清純」 marks the opposite, innocent end.

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

1. エロティシズム。
2. エロチック。