煩
ハン, ボン, わずら.う, わずら.わす, うるさ.がる, うるさ.い

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

JLPT1 G7 S13 F2081

Originally, 見# (fix upon) + 火 fire → figurative fire fixed upon the head → *trouble*; *worry*; *suffer from an illness* → *annoy* (another). Also, *hesitate* (← be troubled over a decision).

[Full Kanji Etymology List]