FROM STRONG’S GREEK DICTIONARY (1890)

Strong’s Greek Dictionary (1890) — public domain, printed whole.

dei δεῖ — die — 3d person singular active present of 1210; also deon deh-on'; neuter active participle of the same; both used impersonally; it is (was, etc.) necessary (as binding):--behoved, be meet, must (needs), (be) need(-ful), ought, should.

see GREEK for 1210