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English word porno comes from English pornography
pornography (English)
(by extension) The depiction of (non-sexual) subject matter so that it elicits feelings analogous to erotic pleasure; any such depiction.. (usually, humorous) The graphic, detailed, often gratuitous depiction of something.. The explicit literary or visual depiction of sexual subject matter; any display of material of an erotic nature. [From mid-19th c.].
pornographic (English)
Containing an explicit depiction of sexual activity.. Depicting something in detail, usually unnecessarily.
porno (English)
Pornographic [from the 1950s] (countable) A pornographic film.. (uncountable) Pornography.