/n/ assimilates to /p/ and is realized as /m/.
/ëw/ is realized as /u/, with an unrelated /w/ inserted as a transition sound.
/w/ is elided in final position.
NOTE: See also "I bring him, I brought him" /mpèsha/ based on the reanalyzed root /-pèsh-/. Tense is not actually specified in either form.