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lunar

/ˈluːnər/

Relating to, resembling, or influenced by the Moon

From Latin lun (moon).

adjective
noun
lun
Proto-Indo-European
Verified
*lewk-
reconstructed
“bright; to shine,” a reconstructed root associated with light

from Proto-Indo-European *lewk- (“bright; to shine”)) + -is (suffix forming adjectives).

Latin
Verified
lūna
“the Moon; crescent shape”

from Old French lunaire (15c.)

+1 more source
Latin
Verified
lūnāris
“of or pertaining to the moon”

from Latin lunaris "of the moon,"

+1 more source
Old French
Verified
lunaire
“lunar,” borrowed from Latin

from Old French lunaire (15c.)

Middle English
Verified
lunar
“shaped like the crescent moon”

from Latin lunaris "of the moon,"

+1 more source
Modern English
Verified
lunar
“relating to or resembling the Moon”

from Latin lunaris "of the moon,"

+1 more source
Modern English
lunar

Picture the Moon as a bright, curved object rather than merely a glowing disk: that crescent shape is part of the ancient story behind Latin lūna, the source of lunar. Latin speakers used lūnāris for anything belonging to the Moon, and the word traveled through Old French lunaire before appearing in Middle English in the early 15th century, initially meaning “crescent-shaped.” The same lunar family produced lunatic, because medieval Europeans believed the Moon could disturb the mind—especially during a full moon—and it also gave anatomy the lunate bone, named for its half-moon shape. In older cosmology, Aristotle’s world divided at the Moon: everything sublunary, literally “under the Moon,” was mortal and changeable, while the heavens above were supposedly perfect and indestructible. So when you call something lunar, you are carrying around a tiny history of moonlight, medieval medicine, and an entire universe arranged in celestial layers.

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