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Jyutping fai3 sam1
Pinyin fèi xīn

Definitions (CC-CEDICT)
  1. to take a lot of trouble (over sb or sth)
  2. may I trouble you (to do sth)
Definitions (Wiktionary)
  1. verb, honorific
    to take the trouble (for example in sentences such as “May I trouble you to ...?”)
  2. verb
    to consume one's energy
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    毫无希望,白费心思。
    毫無希望,白費心思。
    háo wú xī wàng , bái fèi xīn si 。
    • Here goes nothing.
  2. Mandarin
    女王为公爵夫人费心做了很多。
    女王為公爵夫人費心做了很多。
    nǚ wáng wèi gōng jué fū rén fèi xīn zuò le hěn duō 。
    • The Queen has gone to a lot of trouble for the Duchess.