An archaic or obsolete form meaning befriended or made a friend of; treated as a friend.
From the prefix 'a-' + 'friended' (past tense of friend). It's an obsolete English word that was never widely used.
This word shows that 'friend' used to be a verb in English—you could 'friend' someone long before social media existed, and 'affriended' meant someone had befriended you.
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