## Etymology
Learned borrowing from Ancient Greek ληθαργικός (lēthargikós), from λήθαργος (lḗthargos, “forgetful, lethargic”), from λήθη (lḗthē, “a forgetting, forgetfulness”) (from which Lethe (“river in Hades”)) + ἀργός (argós, “not working”). By surface analysis, lethargy + -ic.

## AI Etymology
Lethargic is a learned borrowing from Ancient Greek ληθαργικός (lēthargikós), from λήθαργος (lḗthargos, “forgetful, lethargic”), from λήθη (lḗthē, “a forgetting, forgetfulness”) (from which Lethe (“river in Hades”)) + ἀργός (argós, “not working”). By surface analysis, lethargy + -ic. The analysis is mainly morphological: the modern adjectival form is built from the named base and affix. In present-day use, it means lacking energy and feeling slow or sleepy. Related forms include alethic, alethiology, lethargy, lethe, philalethia. Derived formations include antilethargic, lethargically, lethargicness.

## Topics
- Emotions & Feelings
- Word Formation & Derivatives

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