1: δεκατόω
(Strong's #1183 — Verb — dekatoo — dek-at-o'-o )

from dekatos, "tenth," in the Active Voice denotes "to take tithes of," Hebrews 7:6 , RV, "hath taken (AV, received) tithes;" in the Passive, "to pay tithes," Hebrews 7:9 , RV, "hath paid (AV, 'payed') tithes." In the Sept., Nehemiah 10:37 .

2: ἀποδεκατόω
(Strong's #586 — Verb — apodekatoo — ap-od-ek-at-o'-o )

denotes (a) "to tithe" (apo, "from," dekatos, "tenth"), Matthew 23:23 (AV, "pay tithe of"); Luke 11:42; in Luke 18:12 (where the best texts have the alternative form apodekateuo), "I give tithes;" (b) "to exact tithes" from Hebrews 7:5 .

3: ἀποδεκατόω
(Strong's #586 — Verb — apodekateuo — ap-od-ek-at-o'-o )

"to give tithes," in Luke 18:12 (some texts have No. 2).

Hebrews 7:4-9 Genesis 14:20