The Greek verb dynamoo means to strengthen, empower, or give ability to someone — derived from dynamis (power, might). It describes the impartation of divine strength to those who are weak, especially in the context of spiritual endurance and faithful living.
The concept of divine empowerment is central to Paul's theology of weakness and grace. In Colossians 1:11, Paul prays that believers be 'strengthened with all power according to his glorious might so that you may have great endurance and patience.' This is not self-generated fortitude but divinely imparted capacity. The same dunamis that raised Jesus from the dead is at work in believers (Ephesians 1:19–20). When the disciples were told to wait in Jerusalem for the promise, they received the Spirit and became fearless proclaimers — dynamoo is what happened at Pentecost. God does not call the equipped; He equips the called.