The Greek verb ethō means to be accustomed to or in the habit of doing something. It refers to established custom, regular practice, or ingrained habit. In the New Testament it appears primarily in Luke and Acts, describing the customs of Jesus, His parents, and early Jewish practice.
Luke uses ethō to describe Jesus going to the synagogue 'as was his custom' (Luke 4:16) — revealing that Jesus deliberately maintained regular patterns of worship throughout His earthly ministry. This underscores the importance of habitual spiritual practice. The same word describes Pilate's Passover custom of releasing a prisoner, and the early Jerusalem community's patterns of prayer — demonstrating that ethō (habit, custom) shapes communities as much as individuals.