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Jyutping leng4 keng4
Pinyin líng qíng

Definitions (粵典–words.hk)
  1. 形容詞
    靈驗​;​有效​用​。
    effective; efficacious, reliable (e.g. of a fortune-teller or a god)
    • 呢隻藥油幾靈擎,一搽就止痕。
      呢只药油几灵擎,一搽就止痕。
      This medicated oil is so effective, once applied it stops the itchy immediately.
  2. 參看
    靈keng
Definitions (Kaifangcidian)
  1. 靈驗 – 灵验
  2. 有效
  3. 見效 – 见效
  4. 有效應 – 有效应

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Jyutping ling4 keng4
Pinyin líng qíng

Definitions (CC-CANTO)
  1. working; effective (spoken)
Definitions (Wiktionary)
  1. adj, Cantonese, Hakka
    effective; efficacious
    (syn.) 靈聖, 靈擎, 靈應, 靈影, 靈驗, 靈泛, 靈感, 靈光, 靈
    • 呢只感冒药都几灵擎㖞,食咗两剂当堂舒服啲。
      呢只感冒药都几灵擎㖞,食咗两剂当堂舒服啲。
      ni1 zek3 gam2 mou6 joek6 dou1 gei2 leng4 keng4 wo3, sik6 zo2 loeng5 zai1 dong1 tong4 syu1 fuk6 di1.
      This cold medication is quite effective. After a couple of doses, I immediately felt much better.
Examples (粵典–words.hk)
  1. Cantonese
    呢只药油几灵擎,一搽就止痕。
    呢隻藥油幾靈擎,一搽就止痕。
    • This medicated oil is so effective, once applied it stops the itchy immediately.