Strong's G1163 — δεῖ (verb)
dei (dei`) (also deon deh-on') v.
1. it is (was, etc.) necessary (as binding)
[third person singular active present of G1210, neuter active participle of the same, both used impersonally]
KJV: behoved, be meet, must (needs), (be) need(-ful), ought, should 
Root(s): G1210 
Hebrew root: δέω
Occurrences: 101