'Guard' in the Bible

You, O Lord, will preserve and keep them;You will protect him from this [evil] generation forever.

Keep me [in Your affectionate care, protect me] as the apple of Your eye;Hide me in the [protective] shadow of Your wings

I was blameless before Him,And I kept myself free from my sin.

I said, “I will guard my waysThat I may not sin with my tongue;I will muzzle my mouthWhile the wicked are in my presence.”

Hear my voice, O God, in my complaint;Guard my life from the terror of the enemy.

Set a guard, O Lord, over my mouth;Keep watch over the door of my lips [to keep me from speaking thoughtlessly].