IPA: /dɪˈspɛnsəbl/
KK: /dɪˈspɛnsəbl/
Something that is not necessary or can be done without; it can be replaced or is unimportant.
The extra decorations were dispensable and could be removed without affecting the overall look of the event.
Dispensable is formed from "dis-" (meaning apart) and "pensare" (meaning to weigh or consider). The word describes something that can be weighed or considered as not necessary, hence it can be set apart or done without.
Think of something that can be 'set apart' ('dis-') because it is 'considered' ('pensare') not essential — that's why dispensable means something that is not necessary.