Taxonomy of meanings for 良久:  

  • ENDURING
    • NPabtimelong period of time
    • VP0adSafter a long time 良久乃
    • VPiit took a long time
    • VPi0adVafter a long time, for a long time
    • VPi0postadVfor a long time [or: VPi.postS, but this seems artificial, though logically possible.]
  • SILENCE
    • VPadVhaving kept silent for a good while,...
    • VPiidiomidiomactically in BUDDH texts: be silent for a long while