This noun means 'foot' or 'base,' referring to the part of the body used for stepping or standing. Luke uses it in Acts 3:7 to describe the healing of the lame beggar: 'immediately his feet and ankles (βάσεις καὶ σφυδρά) were made strong.' The term emphasizes the structural foundation of locomotion—the βάσεις are not just anatomical feet but the literal bases that support standing and walking. Classical usage includes steps, rhythmic movements, and architectural bases. Luke's medical precision highlights the completeness of the healing: the man who had never walked now leaps and praises God, his βάσεις transformed from useless appendages to instruments of worship.