恪別𡧲版𢯢𢷮𧵑「討論成員:Keepout2010」

I have considered the same situation. And I've checked the pronunciation of “失”, it includes “thất” and “thắt”, which are closer to “thiết”, but not “sắt”. Then, I also checked the character for “thiết”, then I found that most dictionaries use the simplified form 鉄 for for “thiết”, which includes Dictionnaire Annamite-Français Bonet, Dictionnaire Annamite-Français Genibrel, and Da Nang Chunom Dictionary (1996). <br/>Based on the above, I assume that the simplified character 鉄 would be designed not only for “sắt”, but for both 鐵(thiết) and “sắt”. Because most dictionaries use the same Chuhannom for “thiết” and “sắt”, so I use the same traditonal form 鐵 for both “thiết” and “sắt”. If you think 鉄 is better, we can consider to use it as the standard form, but better the same Chuhannom for both “thiết” and “sắt”.