| Subject | English | German |
| tech. | be lethargic | hartfuehlig |
| slang, BrE | bloody lethargic | lahmarschig |
| rude, BrE | boring, lethargic old sod | Lahmarsch |
| med. | lethargic encephalitis | A-Enzephalitis (encephalitis epidemica, encephalitis lethargica) |
| med. | lethargic encephalitis | Economo Krankheit (encephalitis epidemica, encephalitis lethargica) |
| med. | lethargic encephalitis | Encephalitis epidemica Chauffard (encephalitis epidemica, encephalitis lethargica) |
| med. | lethargic encephalitis | Encephalitis lethargica Economo (encephalitis epidemica, encephalitis lethargica) |
| med. | lethargic encephalitis | Encephalomyelitis subacuta Cruchet (encephalitis epidemica, encephalitis lethargica) |
| med. | lethargic encephalitis | europäische Schlafkrankheit (encephalitis epidemica, encephalitis lethargica) |
| med. | lethargic encephalitis | Nona (encephalitis epidemica, encephalitis lethargica) |
| med. | lethargic encephalitis | Enzephalitis lethargica |
| med. | lethargic encephalitis | Kopfgrippe (encephalitis epidemica, encephalitis lethargica) |
| med. | lethargic encephalitis | Enzephalitis Typ A (encephalitis epidemica, encephalitis lethargica) |
| med. | lethargic encephalitis | Encephalomyelitis subacuta (encephalitis epidemica, encephalitis lethargica) |
| med. | lethargic encephalitis | Encephalitis epidemica lethargica (encephalitis epidemica, encephalitis lethargica) |
| med. | lethargic encephalitis | Encephalitis epidemica (encephalitis epidemica, encephalitis lethargica) |
| med. | lethargic encephalitis | lethargisches Syndrom (encephalitis epidemica, encephalitis lethargica) |
| law, fin. | lethargic market | lustloser Markt |
| med. | lethargic miosis | Schlafmiosis |
| fin. | lethargic state of the Euromarket | Lustlosigkeit des Euromarktes |
| med. | lethargic stupor | Trance |