Bound (to be) - Vine's Expository Dictionary of New Testament Words
Bound (to be)*
(a) of obligation:
[ 1,,G3784, opheilo ]
to owe, whether of a debt or any obligation," is translated "we are bound," in 2 Thessalonians 1:3; 2 Thessalonians 2:13 (the Apostle expressing his obligation to give thanks for his readers). See BEHOVE.
Note: Dei, it is necessary (for which See MUST), expresses, not the obligation (as does opheilo) but the certainty or inevitableness of what is bound to happen, e.g., John 3:15, "must be lifted up" (i.e., inevitably), and Acts 4:12, "wherein we must be saved" (i.e., there is a certainty of salvation).
(b) of binding:
[ 2,,G4029, perikeimai ]
lit., "to lie around" (peri, "around," keimai, "to lie"), "to be compassed," is used of binding fetters around a person, Acts 28:20; in Mark 9:42; Luke 17:2, to hang about a person's neck; in Hebrews 5:2, to compass about, metaphorically of infirmities; in Hebrews 12:1, of those who have witness borne to their faith. See COMPASS, HANG.
Note: For "bound" in Acts 22:5; Acts 24:27, See BIND, No. 1; for Acts 22:25, AV, See BIND, No. 7; for Luke 8:29, See BIND, No. 6.