כַּשְׂדִּי Kasdîy (H3778)

a Kasdite, or descendant of Kesed; by implication, a Chaldaean (as if so descended); also an astrologer (as if proverbial of that people

Chaldea or Chaldeans = "clod-breakers" n pr loc 1) a territory in lower Mesopotamia bordering on the Persian Gulf n pr m 2) the inhabitants of Chaldea, living on the lower Euphrates and Tigris 3) those persons considered the wisest in the land (by extension)

(occasionally with enclitic) כַּשְׂדִּימָה; towards the Kasdites into Chaldea), patronymically from כֶּשֶׂד (H3777) (only in the plural);