Elementary (A2)
IPA: /ʌnˈfɪld/
KK: /ʌnˈfɪld/
Definition
Describing something that has not been filled or occupied.
Example
The unfilled positions in the company are causing delays in projects.
Conversation

I noticed that some of the boxes are still unfilled in the storage room.

Yeah, I haven't gotten around to organizing them yet.

We should probably take care of that soon so it doesn't get worse.

Good idea! An unfilled space can really make things look messy.
Synonyms & Antonyms
Definition
To remove the contents from something that was filled.
Example
The technician unfilled the container to clean it properly.
Tense Forms
Past: unfilled
Past Participle: unfilled
Conversation

Did you notice that the balloon unfilled after we let it go?

Yeah, it was kind of funny to watch.

I didn't expect it to unfilled so quickly, though.
Root Explanation
Unfilled → It is formed from "un-" (meaning not) and "filled" (from the Old English "fyllan", meaning to make full). The word "unfilled" means not filled or lacking content.
Memory Tip
Think of 'not' ('un-') having something 'full' ('filled') — that's why unfilled means something that is not full.
Visually Confused Words
unfrilled
unrefilled
unwilled
untilled
unpilled
unmilled
unkilled
unfulled