Strong's G1939 — ἐπιθυμία (noun)
epithumia (ep-ee-thoo-mee'-ah) n.
1. a longing
2. (especially) a lust for what is forbidden
[from G1937]
KJV: concupiscence, desire, lust (after) 
Root(s): G1937 
Hebrew root: ἐπιθυμέω
Occurrences: 38