Ruth 1:20

And she said, call me not Naomi, call me Mara
The one signifying "prosperity", according to Josephus ^F13, and the other "grief"; but he is not always correct in his interpretation of Hebrew words, or to be depended on; by this indeed her different states are well enough expressed, and he rightly observes, that she might more justly be called the one than the other; but the words signify, the one "sweet" and pleasant, and the other "bitter", see ( Exodus 15:23 ) , and the reason she gives confirms it:

for the Almighty hath dealt very bitterly with me;
had wrote bitter things against her, brought bitter afflictions on her, which were very disagreeable to the flesh, as the loss of her husband, her children, and her substance; see ( lam 3:15 lam 3:19 ) .