IPA: /ˈdɪməbl/
KK: /ˈdɪməbəl/
Able to be made less bright or to have its light reduced.
The new light bulbs are dimmable, allowing you to adjust the brightness according to your needs.
Dimmable → It is formed from "dim" (from Old English "dimm", meaning not bright or obscure) and "-able" (meaning capable of). The word "dimmable" refers to something that is capable of being made less bright or obscured.
Think of something that can be made 'not bright' ('dim') and is 'capable' ('-able') of being adjusted. This helps you remember that 'dimmable' means it can be made less bright.