Strong's G1479 — ἐθελοθρησκεία (noun)
ethelothreskeia (eth-el-oth-race-kei'-ah) n.
1. willful (arbitrary and unwarranted) piety, i.e. pretended, false, or counterfeit observance
[from G2309 and G2356]
KJV: will worship 
Root(s): G2309, G2356 
Hebrew root: θρησκεία
Occurrences: 1