Russian

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Etymology

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Initialism of противораке́тная оборо́на (protivorakétnaja oboróna).

Pronunciation

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  • IPA(key): [pɛ ɛr ˈo] (phonetic respelling: пэ-эр-о́)

Noun

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ПРО (PROf inan (indeclinable)

  1. missile defense