←
Proto-Slavic *u (inherited)
→
Old Church Slavonic оубити (prefix)
→
Old Church Slavonic оужасъ (prefix)
→
Old Church Slavonic оутварь (prefix)
→
Old Church Slavonic оупити (prefix)
→
Old Church Slavonic оурокъ (prefix)
→
Old Church Slavonic оуставъ (prefix)
→
Old Church Slavonic оубо (compound)