'Effectiveness' in the Bible

Of this [gospel] I was made a minister by the gift of God’s grace given me through the working of His power.

extinguished the effectiveness of fire, escaped the edge of the sword, were made strong from weakness, became mighty in battle, put to flight enemy battle lines.

So confess your sins to one another and pray for one another so that you may be healed. The prayer of a righteous person has great effectiveness.