'Strength' in the Bible

And Jehu drew his bow with his full strength, and smote Joram between his arms; and the arrow went out at his heart, and he sunk down in his chariot.

Thou sayest (but they are but vain words), There is counsel and strength for the war. Now on whom dost thou trust, that thou hast rebelled against me?

And they said unto him, Thus saith Hezekiah, This day is a day of trouble, and of rebuke, and of contumely; for the children are come to the birth, and there is not strength to bring forth.