开 (pinyin kāi, "to open") is an HSK 1 Mandarin character with 4 strokes, built on the radical 廾.

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开

New

kāi

to open, to drive

Tone 1 · First tone (high level)

Radical

廾

Strokes

HSK

1 · tier 1b

Pinyin neighbors

Characters with the same rime -ai, same-tone matches first. Many are true phonetic relatives; others are coincidental.