惑 means “be bewildered, mislead”

わく · waku

Also: beguile, delusion, perplexity

Kun'yomi (Japanese reading)
まどう
On'yomi (Chinese reading)
ワク

JLPT N1 · Taught in secondary school · 12 strokes

The story

A heart (心) under 或, "a certain one", never sure which: torn between choices. 迷惑 is the trouble you cause others, 戸惑う is to be at a loss, and a 惑星, a planet, is a "wandering star" that drifts among the fixed ones.

Used in 迷惑 (meiwaku, trouble/nuisance), 惑星 (wakusei, planet), and 戸惑う (tomadou, to be at a loss)

More from Hidden & Hazy

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