dei (Greek #1163)
also δέον (deh-on'); neuter active participle of the same; both used impersonally; it is (was, etc.) necessary (as binding)
KJV usage: behoved, be meet, must (needs), (be) need(-ful), ought, should.
Pronounce: die
Origin: 3d person singular active present of 1210
oun (Greek #3767)
(adverbially) certainly, or (conjunctionally) accordingly
KJV usage: and (so, truly), but, now (then), so (likewise then), then, therefore, verily, wherefore.
Pronounce: oon
Origin: apparently a primary word