die out

In these mice, the NK cells died out within two weeks, and the cancer spread unchecked.

When the last tree of a given variety dies out, it’s gone forever.

Yet the laughs, the warmth, the love and the faith-based fellowship die out in the dismal final act.

In his view, it is time to fight against these villages dying out.

It was held, even in the South, to be a regrettable evil which the slave states would eventually abolish or allow to die out in some undefined way.