Why advanced-word swaps can reduce clarity
If a replacement word belongs to a different context, the sentence becomes awkward or even changes the prompt meaning.
Around Band 6, vocabulary problems are usually about unstable meaning, collocation, and topic fit, more than simple words.
Accuracy affects meaning before impressive vocabulary does.
There is some topic vocabulary, but usage is unstable and sometimes distorts the point.
Word choice fits the topic better, collocation is more natural, and fewer errors affect clarity.
If a replacement word belongs to a different context, the sentence becomes awkward or even changes the prompt meaning.
Pick five key topic words first and check their collocation, word form, and context stability.
These pages explain the Banfen Writing diagnostic and blocker-repair method, Task 1 overview, Task 2 development, and common score blockers.
Submit one essay and find the vocabulary accuracy issue to fix first.