心如刀割

xīnrúdāogē
  1. to feel as if having one's heart cut out (idiom)
  2. to be torn with grief

CEDICT

to be heartbroken

Wiktionary

內心痛苦像被刀割一樣。元．秦{[90ba]}夫《趙禮讓肥．第一折》：「待著些粗糲，眼睜睜俺子母各天涯，想起來我心如刀割，題起來我淚似懸麻。」《三國演義．第二三回》：「操怒教打。身上無容刑之處，承在座觀之，心如刀割。」也作「心如刀絞」、「心如刀攪」、「心如刀鋸」、「心如刀剉」。

重編國語辭典

內心的痛苦感受

維基詞典

Entry Composition

1 心 xīn
  1. heart
  2. mind
  3. intention
  4. center
  5. core

classifiers: 顆, 個
2 如 rú
  1. as
  2. as if
  3. such as
3 刀 dāo
  1. (slang) (loanword) dollar
  2. classifier for sets of one hundred sheets (of paper)
  3. classifier for knife cuts or stabs
  4. (Internet slang) to bargain; to ask for a small discount (esp. on second-hand marketplaces)

classifier: 把
4 割 gē
  1. to cut
  2. to cut apart