Encara no tenim significats per a "pass fain".
1Ah, damosel, said he, with that knight would I meet passing fain.
2When Balin was past those countries he was passing fain.
3"Ah, damsel," said he, "with that knight would I meet passing fain."
4And so by noon they came to Camelot; and the king and the queen were passing fain of his coming to the court.