Strong's Concordance

Original word: ἐθελοθρησκεία
Transliteration: ethelothréskia
Definition (short): self-made
Definition (full): self-willed (arbitrary and unwarranted) piety

NAS Exhaustive Concordance

Word Origin: from an older form of theló and thréskeia
Definition: self-willed (arbitrary and unwarranted) piety
NASB Translation: self-made religion (1).
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Strong's Exhaustive Concordance

From ethelo and threskeia; voluntary (arbitrary and unwarranted) piety, i.e. Sanctimony -- will worship.

see GREEK ethelo

see GREEK threskeia

KJV: Which things have indeed a shew of wisdom in will worship, and humility, and neglecting of the body; not in any honour to the satisfying of the flesh.
NASB: These are matters which have, to be sure, the appearance of wisdom in self-made religion and self-abasement and severe treatment of the body, but are of no value against fleshly indulgence.