IPA: /ɪkˈstɛnʃən/
KK: /ɪkˈstɛnʃən/
A noun that refers to something added to increase size, time, or capability, such as a part of a building, a program for learning, or a file type in computing.
The school offers an extension program for students who cannot attend regular classes.
Extension → It is formed from "ex-" (meaning out) and "tendere" (meaning to stretch). The word describes the act of stretching something out or making it longer.
Think of 'stretching out' ('ex-') something to make it longer ('tendere'). That's what extension means.