Act of enervating; debilitation. / State of being enervated; debility.

plural of enemy

Third-person singular simple present indicative form of enemy

Used other than figuratively or idiomatically: see enemy, combatant. / (US, military) Any person in an armed conflict who may be properly detained under the laws and customs of war.

(physics) A property, characteristic of the state of a thermodynamic system, the change of which is equal to the heat absorbed minus the work done by the system.

(physics) Any of the discrete stable energies that a quantum mechanical system (such as the electrons of an atom) can have. / Used other than figuratively or idiomatically: see energy, level.

(chemistry) The net potential energy liberated or absorbed during the course of a chemical reaction

heat under the ground used to heat water and make steam to turn generator turbines and make electricity.

(physics) The energy needed to separate the constituent parts of an atom or nucleus; equivalent to the mass defect.

(physics) The energy released by a nuclear reaction; either through nuclear fission or nuclear fusion / Such energy used as a power source.