'Struggle' in the Bible

so Rachel said, "I've been through a mighty struggle with my sister and won." She named him Naphtali.

When the man realized that he hadn't yet won the struggle, he injured the socket of Jacob's thigh, dislocating it as he wrestled with him,

Lay your hand on him, and you'll remember the struggle. You'll never do that again!

How long must I struggle in my soul at night and have sorrow in my heart during the day? How long will my enemy rise up against me?

For there is no struggle at their deaths, and their bodies are healthy.

I dedicated myself to using wisdom for study and discovery of everything that is done under heaven. God uses terrible things so human beings will struggle with life.

So then I recommended enjoyment of life, because it is better on earth for a man to eat, drink, and be happy, since this will stay with him throughout his struggle all the days of his life, which God grants him on earth.