تحاذا doesn't appear in Hans Wehr's Modern Standard Arabic dictionary, but Lane's Arabic-English Lexicon has an entry for it. Select the entry below for the full classical Arabic definition.

• تَحَاذَا Form 6

  6 تَحَاذَا ذ They were, or became, over against, or opposite to, each other; they faced, or fronted, each other. -b2- And They matched each other; each of them was, or became, the match, fellow, or equal, of the other.] …

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