/ë/ is inserted as a transition sound (1) between /k/ and /n/ and (2) between /h/ and /m/ of the MP suffix.
Unstressed /ë/ of the passive suffix is elided, and /ë/ of the verbal suffix is rounded to /ù/ after /w/.
/wa/ is realized as /o/, and /w/ is elided in final position after a vowel.