fully understand — completely understand
collocationB1IELTS 5+neutralcommon
To understand something completely, with no confusion or missing information.
Say it like a native
Textbook I comprehend the matter in its entirety.
Native I fully understand.
'Comprehend the matter in its entirety' is stiff; 'fully understand' is the natural phrase.
Pattern: fully understand + noun/wh-clause
In use
- I fully understand the instructions, so I can start the project right away.communication
- In my opinion, it's important to fully understand the rules before you start a new job, because it helps you avoid mistakes.IELTS speaking
Common mistake
✗ I don't fully understand about it.
✓ I don't fully understand it.
'Understand' takes the object directly — no 'about'.
Common collocations
fully understand— I, don't, the situation, why
Don't confuse it
Stronger than just 'understand'—it means you have no doubts or confusion.