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Jyutping jap6 gwat1
Pinyin rù gǔ

Definitions (Wiktionary)
  1. adv
    to the bone; deeply (of hatred, love, etc.)
  2. adv, Hokkien, Mainland-China
    extremely
    (syn.) 入腹, 極了, 入心, 极了
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (粵典–words.hk)
  1. Cantonese
    我恨佢恨到入骨。
    我恨佢恨到入骨。
    ngo5 han6 keoi5 han6 dou3 jap6 gwat1.
    • I hate him bitterly.
  2. Cantonese
    我对佢恨之入骨。
    我對佢恨之入骨。
    • I hate him very much.