clean-energy
UK[ˌkliːn ˈenədʒi]US[ˌkliːn ˈenərdʒi]
n
Energy that is produced and used in ways that cause little or no harm to the environment, especially by not producing greenhouse gases.
Morpheme Breakdown
clean
energy
clean
free from dirt
energy
power
Etymology
The compound 'clean-energy' is a modern formation that directly combines two established English words to create a specific, environmentally-focused concept. The adjective 'clean', with its Germanic roots and core meaning of purity and freedom from contamination, is applied metaphorically to the noun 'energy', a term of Greek philosophical origin (energeia meaning 'in work') that entered scientific vocabulary. The logic of the compound is transparent: it designates power generated from sources or processes that are considered 'clean'—free from the polluting byproducts, particularly carbon emissions, associated with traditional fossil fuels. This term emerged in the late 20th century as environmental concerns rose to prominence, linguistically framing sustainable technology through the positive, hygienic connotations of 'clean' contrasted with the implied 'dirtiness' of conventional energy.
Analysis
Structure: clean (free from dirt) + energy (power)
- clean: From Old English clǣne (pure, clean, clear), of Germanic origin. In this compound, it functions as an adjective modifying the noun 'energy', specifying its type.
- energy: From Greek energeia (activity, operation), via Latin energia and French énergie. In this compound, it functions as the head noun, denoting the core concept of power or usable power.
Examples
The government is investing heavily in solar and wind power to promote clean-energy.
Many consumers are now choosing clean-energy options from their utility providers.
Advances in battery storage are crucial for the wider adoption of clean-energy.