 riefe > gröefe) 
2.3.2.5 i > o (e.g.wiige > gwooge) 
2.3.3 Infinitive and Present Sg i - Participle ù 
2.3.3.1 i > u (e.g.binde > bùnde) 
2.3.4 Infinitive ä/e - Present i - Participle o/u 
2.3.4.1 ä - i - o (e.g.