This modern formation uses Greek-derived elements for stealing and an excessive propensity.
The suffix developed from Greek manía, a word for frenzy.
Sources
- Merriam-Webster: kleptomania
The headword is formed from two combining forms.
- Merriam-Webster: klept-
The stealing element traces to Greek kleptein.
- Merriam-Webster: -mania
The suffix can denote an excessive propensity; its Greek source is manía.
- Merriam-Webster: kleptocracy
The related word uses the same stealing component with a governmental ending.
- Online Etymology Dictionary: kleptocracy
Also built on *klepto-* "thief" (see kleptomania + -cracy): kleptocracy