I was wondering which is the correct form. радио or ра́дио ? I mean I've seen people writing both of them. And I've also seen many letters with this accent above the a. Is it necessary? Which spelling is correct?

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    We don't usually write words with a stress mark in everyday life. It's usually done in dictionaries and textbooks for learners.
    – V.V.
    Jul 19, 2017 at 18:22

1 Answer 1


Both forms are correct.

The "accent" is a stress mark. Stress marks are omitted in most books. They are printed in books for beginner readers, and in words where a change of stress would change the meaning.

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    @shader301202 No, it's not. It's exactly how everyone writes it, outside of dictionaries and textbooks.
    – Vitaly
    Jul 19, 2017 at 21:26
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    @shader301202 one small exception is ё letter. 1) it is never written with the stress mark, for it is always stressed if present (at least in non-foreign words). 2) many people, maybe majority, skip those dots and write ё as e instead
    – Arioch
    Jul 20, 2017 at 9:24
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    @Vitaly ...or when incorrect/unusual stressing was used and that specifics has to be written down, like if writing some gorbachevisms or remote village dialect, etc
    – Arioch
    Jul 20, 2017 at 9:26
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    @Arioch "1) it is never written with the stress mark:" Sometimes it is! ru.wikipedia.org/wiki/… Jul 20, 2017 at 14:32
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    @Arioch "it is always stressed if present" - except for the word ёфика́ция :) Jul 20, 2017 at 14:33

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