TgJ 2K2:10 :וְאִם לָאו‏ : but if it is not the case
See the entire entry for lāw/law adv. not, it is not

TgJ 2K2:10 :אַקשִיתָא לְמִשאַל‏ : you have asked a difficult thing
See the entire entry for qšy vb. to be difficult