Intermediate (B1)
IPA: /ɪkˈspændər/
KK: /ɪkˈspændər/
Definition
A person or thing that makes something larger or more extensive.
Example
The expander helped to increase the size of the balloon quickly.
Conversation

Have you heard about the new expander they developed for medical use?

Yeah, I read it's supposed to help increase blood volume during emergencies.

Exactly! It could really save lives in critical situations.

For sure, it's amazing how technology keeps advancing in healthcare.
Synonyms & Antonyms
Antonyms
reducer
diminisher
shrinker
Root Explanation
Expander → It is formed from "ex-" (meaning out) and "pandere" (meaning to spread). The word "expander" refers to something that spreads out or enlarges.
Memory Tip
Think of something that spreads "out" ('ex-') — that's why an expander means something that makes things larger.
Visually Confused Words
expender
pander
expounder
explainer
alexander
meander
leander