Strong H4341 מַכְאוֹב mak'ôb mak'ôb mak'ôbâh · pain

Ecclesiastes

1. Ecclesiastes 1:18
   For in much wisdom is much grief: and he that increaseth knowledge increaseth sorrow.
2. Ecclesiastes 2:23
   For all his days are sorrows, and his travail grief; yea, his heart taketh not rest in the night. This is also vanity.