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Jyutping naai5 zi3 jyu1
Pinyin nǎi zhì yú

Definitions (Wiktionary)
  1. conj, literary
    even; even if; go so far as to; to the extent that
    (syn.) 甚而至于, 甚至於, 以至于, 甚至于, 乃至, 连, 甚而至於, 以至, 甚且, 以至於, 甚而, 甚至, 連
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)