Word: 铁了心 (tiělexīn) Traditional: 鐵了心 铁了心 dictionary entry tiělexīn determined; unshakable Full dictionary entry for 铁了心 Example sentences using 铁了心 2 sentences, showing page 1 of 1. 吃了秤砣，铁了心 chīle chèngtuó, tiělexīn swallowed a steelyard weight: heart turned to iron 王八吃秤锤，铁了心 wángba chī chèngchuí, tiělexīn a turtle swallows a steelyard weight: its heart has turned to iron