ETYM Old Eng. whennes, whens (with adverbial s, properly a genitive ending; -- see -wards), also whenne, whanene, AS. hwanan, hwanon, hwonan, hwanone; akin to Dutch when. Related to When, Hence, Thence.
From what place or origin or source; SYN. wherefrom.
whereas / hweræz /
1. Considering that; it being the case that; since; -- used to introduce a preamble which is the basis of declarations that follow.
2. When in fact; while on the contrary; the case being in truth that; although; -- implying opposition to something that precedes.
yet / jet /
ETYM Old Eng. yet, yet, yit, AS. git, gyt, giet, gieta; akin to OFries. ieta, eta, ita, Mid. High Germ. iezuo, ieze, now, German jetzo, jetzt.
Up to the present time.