If something or someone is unlamented, people do not feel sad that it has or they have gone.

The old stadium is unlamented by all but a few diehard fans. 除了几个死忠粉以外，大家对这个老体育场都没什么感情。

The late and largely unlamented former president gives his name to several public buildings. 这位过世的但无人哀悼的总统以他的名字命名了几座公共建筑。