不 (pinyin bù, "not") is an HSK 1 Mandarin character with 4 strokes, built on the radical 一.
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不
Newbù
not, no
Tone 4 · Fourth tone (falling)
Radical
一
Strokes
4
HSK
1 · tier 1a
Commonly confused with
Characters this one is often mistaken for — same number of strokes, similar silhouette, single-component differences. Curated, not derived.
Radical family
Other characters built on the same radical 一. Often shares meaning category.
Pinyin neighbors
Characters with the same rime -u, same-tone matches first. Many are true phonetic relatives; others are coincidental.