Meanings of bitter savor in English

They kissed in silence: they felt on their lips the bitter savor of their tears.

With what bitter savor, with what grossness of diction, caught from the Elizabethan and satirical elements in his culture, he spends anger in words!

For the first time in eight years, the wretched man had just tasted the bitter savor of an evil thought and of an evil action.

"Life is bad enough now," she continued without heeding the interruption, "but better a bitter savor than none at all."