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Jyutping sam6 ji4 zi3 jyu1
Pinyin shèn ér zhì yú

Definitions (Wiktionary)
  1. conj, Wu
    even; even if; go so far as to; to the extent that
    (syn.) 甚至於, 以至于, 甚至于, 乃至, 连, 乃至於, 以至, 甚且, 以至於, 甚而, 甚至, 乃至于, 連

甚而至於 [---于]

Jyutping
Pinyin shèn ér zhì yú

Definitions (CC-CEDICT)
  1. even
  2. so much so that