הִילְכָךְ, (= הֵי לְכָךְ) therefore. Yoma 74ᵇ הי׳ מאן וכ׳ therefore (since sight aids in satisfying the appetite) &c. Meg. 21ᵇ הי׳ therefore (since the opinions differ); a. fr. [Ms. M. 2 reads הולכך, v. Rabb. D. S. vol. VI, preface, p. I, note.]