煩 means “bother, troublesome”

わずらわしい · wazurawashii

Also: anxiety, trouble, worry, pain

Kun'yomi (Japanese reading)
わずらう, わずらわす, うるさがる, うるさい
On'yomi (Chinese reading)
ハン, ボン

JLPT N1 · Taught in secondary school · 13 strokes

The story

Fire (火) beside a head (頁): 煩 once meant a hot, aching head, and it is still the feeling of being pestered. 煩わしい is tiresome, 煩雑 is messy and complicated, and 煩悩, worldly desires, are said to number 108, one for each toll of the temple bell on New Year's Eve.

Used in 煩わしい (wazurawashii, troublesome), 煩雑 (hanzatsu, complicated), and 煩悩 (bonnou, worldly desires)

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Readings from KANJIDIC2, © EDRDG, CC BY-SA.