BT Er 51a(4) :כי מסגי קליל קליל‏ : when he walks about very slowly
See the entire entry for sgy#3 vb. to go

BT Er 51a(4) :חשכה לו כי מסגי קליל קליל‏ : as he was going, it slowing got dark on him
See the entire entry for qallīl adj. light; quick; few