Lewis & Short

pŏtĭn’ is used,

  1. I. For potisne: potin’ es? i. e. potes? can you? are you able? Ter. And. 2, 6, 6; Plaut. ap. Gell. 7, 7, 3.
  2. II. For potisne est? i. e. potest? potin’ ut desinas? can you leave off? i. e. pray leave off, Ter. Ad. 4, 1, 23: potin’ ut taceas? i. e. be silent, Plaut. Poen. 4, 2, 94.