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Jyutping bat1 faa3
Pinyin bù huà

Definitions (Wiktionary)
  1. verb, literary
    to not decay; to not spoil
  2. verb, literary
    to not change; to be unchanged
    (syn.) 不變, 不变
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    她从不化妆, 但总是看起来很迷人。
    她從不化妝, 但總是看起來很迷人。
    tā cóng bù huà zhuāng , dàn zǒng shì kàn qǐ lai hěn mí rén 。
    • She never wears makeup, but she always looks very charming.
Examples (粵典–words.hk)
  1. Cantonese
    李伯咁食古不化, 冇人同佢相处到。
    李伯咁食古不化, 冇人同佢相處到。
    lei5 baak3 gam3 sik6 gu2 bat1 faa3, mou5 jan4 tung4 keoi5 soeng1 cyu5 dou2.
    • Old Mr. Lee is so stubborn that no one can get along well with him.