染 (rǎn) means “to dye; to catch (a disease); to acquire (bad habits etc); to contaminate; to add color washes to a painting”. It is an HSK 6 Chinese character in the HSK 3.0 vocabulary.
她把头发染成了红色。
Tā bǎ tóufa rǎn chéng le hóngsè.
She dyed her hair red.
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