Based on English borrowing: "boots."
/n/ coalesces with /m/ to form a single unit: /m/.
/mp/ creates a single sound much like /b/.
/ë/ is inserted as a transition sound between /h/ and /m/ of the MP suffix.
The /m/ of this suffix is elided before /n/.
The first person plural suffix /-nan/ is realized as /-na/ in final position.