BT Git 35a(30) :בשני דרב קיל נידרי‏ : in PN's time vows were treated leniently
See the entire entry for qyl adj. lenient

BT Git 35a(30)var. :בשני דרב קיל"קל" נידרי‏ : in PN's time vows were treated leniently
See the entire entry for qll vb. to be light