From BiblePortal Wikipedia

Vine's Expository Dictionary of NT Words [1]

1: Ὀφείλω (Strong'S #3784 — — opheilo — of-i'-lo, of-i-leh'-o )

"to owe," is once rendered "behove,"  Hebrews 2:17; it indicates a necessity, owing to the nature of the matter under consideration; in this instance, the fulfillment of the justice and love of God, voluntarily exhibited in what Christ accomplished, that He might be a merciful and faithful High Priest. See Bound , Debt , Due , Duty , Guilty , Indebted , Must , Need , Ought , Owe.

2: Δεῖ (Strong'S #1163 — Verb — dei — die, deh-on' )

"it is necessary," is rendered "behoved," in  Luke 24:46; RV, (that the Christ) "should" (suffer). Dei expresses a logical necessity, opheilo, a moral obligation; cp. chre,  James 3:10 , "ought," which expresses a need resulting from the fitness of things (Trench, cvii). See Meet , Must , Need , Ought.

Webster's Dictionary [2]

(v.) and derivatives. See Behoove, &c.