Russian language:

Older letters of the Russian alphabet include ⟨ѣ⟩, which merged to ⟨е⟩ (/je/ or /ʲe/); ⟨і⟩ and ⟨ѵ⟩, which both merged to ⟨и⟩ (/i/); ⟨ѳ⟩, which merged to ⟨ф⟩ (/f/); ⟨ѫ⟩, which merged to ⟨у⟩ (/u/); ⟨ѭ⟩, which merged to ⟨ю⟩ (/ju/ or /ʲu/); and ⟨ѧ/⟨ѩ⟩⟩, which later were graphically reshaped into ⟨я⟩ and merged phonetically to /ja/ or /ʲa/. While these older letters have been abandoned at one time or another, they may be used in this and related articles. The yers ⟨ъ⟩ and ⟨ь⟩ originally indicated the pronunciation of ultra-short or reduced /ŭ/, /ĭ/.

Please answer a question about this article. If the question is unanswerable, say "unanswerable". What did the r become?
unanswerable