moonlight
UK[ˈmuːnlaɪt]US[ˈmuːnlaɪt]
n
the light that comes from the moon at night
v
to have a second job, especially one that is done at night or secretly, in addition to your main job
Morpheme Breakdown
moon
light
moon
celestial body
light
illumination
Etymology
the word 'moonlight' is a transparent compound formed from two old english elements: 'mōna' (moon) and 'lēoht' (light). it directly describes the phenomenon of illumination provided by the moon, a concept as ancient as human observation of the night sky. the verb sense, meaning to work a second job, emerged in american english in the mid-20th century, drawing a metaphorical connection between the secretive or extra nature of such work and activities conducted under the cover of moonlight. this evolution showcases how a concrete, physical compound can develop an abstract, socio-economic meaning.
Analysis
Structure: moon (celestial body) + light (illumination)
moon (old english, noun, referring to the earth's natural satellite); light (old english, noun, referring to the natural agent that stimulates sight and makes things visible)
Examples
the path was clearly visible in the bright moonlight.
many teachers moonlight as tutors to supplement their income.
they took a romantic walk along the beach in the moonlight.