BT BM 23b(48) :דחזא דקדחו בה חילפי‏ : he saw that ferns had sprouted in it
See the entire entry for ḥlp#4 n.m. fern

BT BM 23b(48) :משום יאוש בעלים נגעו בה, דחזא דקדחו בה חילפי,‏ : they treated this matter as one due to "owners' despair", for he saw that ferns had sprouted in (the pitch)
See the entire entry for qdḥ vb. to drill; to clear out