'Strength' in the Bible

And Jehu drew a bow with his full strength, and smote Jehoram 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,) I have counsel and strength for the war. Now on whom dost thou trust, that thou rebellest against me?

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