expression, godan verb (-ru)
add kana; add Japanese reading
Specifically means to annotate kanji with small kana (furigana) to show the reading. Often used in the context of typesetting, editing, or explaining how to read a word.
難しい漢字には仮名を振ってください。
Please add kana readings to the difficult kanji.
この本はすべての漢字に仮名が振ってある。
In this book, kana readings are added to every kanji.