PTBik 65.d:18[2] :הוה בקי במרגליתא בכל מילה‏ : he was an expert in all matters pertaining to pearls
See the entire entry for bqē/ī adj. expert

PTBik 65.d:18[2] :הוה בקי במרגליתא בכל מילה‏ : he was an expert in all matters pertaining to pearls
See the entire entry for mi/ellā, mi/elləṯā n.f. word, speech; thing