IPA: /rɪˈtræktəbl/
KK: /rɪˈtræktəbl/
Able to be pulled back or drawn in, often used to describe objects that can be made smaller or hidden away.
The retractable roof of the stadium can be opened or closed depending on the weather.
Retractable → It is formed from "re-" (meaning back or again) and "tractare" (meaning to draw or pull). The word "retractable" means capable of being drawn back or pulled back.
Think of something that can be 'pulled back' ('tractare') again ('re-') — that's why retractable means it can be drawn back.