KanjiJLPT N1
Vexation

anxiety, trouble, worry, pain, ill, annoy, nuisance, irksome

Mnemonic

A fire ignites every page of your thesis the night before it's due. You watch each page curl into ash, smoke stinging your eyes. The vexation is unbearable — months of work reduced to embers, your mind burning with frustration hotter than the fire itself.
Additional thoughts
Fire + Page = mental burning. Picture the physical fire destroying pages mirroring the internal fire of irritation and distress. The double burning — outer flames, inner torment — locks in Vexation.
Quick recall
A fire devours every page of your work, filling you with searing vexation.

Details

The keyword for 煩 is vexation. This kanji conveys the sense of being troubled, annoyed, or burdened by worry and irritation. It captures the feeling of mental agitation and distress that comes from being overwhelmed by complicated or bothersome matters. The character is often associated with the idea of something being troublesome, irksome, or causing persistent unease in one's mind.
On'yomi
はん、ぼん
Kun'yomi
わずら.う、わずら.わす、うるさ.がる、うるさ.い