unsung
adjective uk/ˌʌnˈsʌŋ/ us/ˌʌnˈsʌŋ/
（勤奋工作、英勇行为、巨大成就等）被埋没的，未得到赞扬的
not noticed or praised for hard work, courage, or great achievements
an unsung hero/heroine 无名英雄／女英雄
Many of her achievements went unsung until after her death. 她的很多成就直到她死后才被人注意到。