鐵心 [铁－]

Jyutping tit3 sam1
Pinyin tiě xīn

Definitions (CC-CANTO)
  1. iron core;to be unwavering in one's determination
Definitions (Wiktionary)
  1. verb
    to be unshakable in one's determination
  2. noun
    iron core
    (syn.) 铁芯, 鐵芯
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）