Ergasia covers the full spectrum from physical labor to commercial enterprise and the profit it yields. In Acts, the word appears in vivid economic contexts: a slave girl's divination brought her owners much ergasia ('profit,' Acts 16:16, 19), and Demetrius the silversmith rallied fellow craftsmen by warning that their ergasia ('business/trade,' Acts 19:24-25) was under threat. Luke 12:58 uses it for the effort one should exert to settle a dispute on the way to court. Paul employs it in Ephesians 4:19 for the 'working' or 'practice' of impurity, where Spanish renders it 'práctica'—highlighting the word's extension from economic labor to moral activity.