IPA: /pərˈmɪsəblɪ/
KK: /pərˈmɪsəblɪ/
In a way that is allowed or permitted according to rules or laws.
The students can permissibly use their notes during the exam.
Permissibly → It is formed from "permittere" (meaning to allow) and the suffix "-ible" (meaning capable of being). The word "permissibly" means in a manner that is allowed or capable of being permitted.
Think of 'allowing' ('permittere') something to happen, and remember that 'permissibly' means it can be done in an allowed way.