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

"to owe, to be indebted," is translated "it was our duty," in Luke 17:10 , lit., "we owe (ought) to do;" so in Romans 15:27 , AV, "their duty is:" RV, "they owe it." See BEHOVE , BOUND.