Who did hinder you? (tis humas enekopseṅ). First aorist active indicative of enkoptō, to cut in on one, for all the world like our use of one cutting in on us at the telephone. For this late verb see note on Act 24:4; note on 1Th 2:18. Note the singular tis. There was some ringleader in the business. Some one “cut in” on the Galatians as they were running the Christian race and tried to trip them or to turn them.