(ii) Ashiyshah (809) - something closely pressed together, i.e. a cake of raisins or other comfits:
From root meaning 'burnt down to the foundations'. - down to bear essentials.
A dessert or delicacy in Solomon's time <Song 2:5>; (flagon, KJV). These cakes were made from dried raisins. Raisin cakes were also connected by the prophet Hosea with sacrifices made to the pagan god Ishtar <Hos. 3:1>.
(from Nelson's Illustrated Bible Dictionary)
(Copyright (C) 1986, Thomas Nelson Publishers)
(iii) Basics of Christian faith (foundations) - used to nourish us.
(iv) (a) 2:5
(b) Heb 6:1-2