1) hads; 2) hadsidan, hads zadan
Fr.: 1) deviner; 2) conjecture
1a) An opinion that one reaches or to which one commits oneself on
the basis of probability alone or in the absence of any evidence
M.E. gessen, perhaps from Scandinavian; cf. Sw., Dan., Norw. gissa, M.L.G. gissen, M.Du. gessen, related to verb get.
Hads, from Ar. Hads "intuition, conjecture, surmise."