IPA: //ˈmʌstæʃt//
KK: /mʌsˈtæʃt/
Having hair on the upper lip, typically styled in various ways.
The mustached man smiled as he walked by.
Mustached → It is formed from "mustache" (from Old French *moustache*, meaning the hair growing on the upper lip) and the suffix "-ed" (indicating a state or condition). The word "mustached" describes someone who has a mustache or is in the condition of having a mustache.
Think of the word 'mustache' which refers to the hair on the upper lip, and remember that 'mustached' means having that hair.