lunar: [17] Latin lūna ‘moon’ came from an Indo- European base which also produced English light (not to mention a range of Latin ‘light’- words, such as lūx and lūmen, which have given English illustrate, lucid, luminous, lustre, etc). It had two adjectival derivatives: lūnāris, which simply meant ‘of the moon’, and was borrowed by English as lunar; and lūnāticus.
This was originally used for ‘living on the moon’, but subsequently came to employed in the sense ‘crazy’, from the notion that certain sorts of periodic madness were caused by the phases of the moon. English acquired it via Old French lunatique as lunatic [13]. => illustrate, light, luminous, lunatic, lustre
lunar (adj.)
"crescent-shaped," early 15c.; "pertaining to the moon," 1620s, from Old French lunaire (15c.), from Latin lunaris "of the moon," from luna "moon" (with capital L- "moon goddess"); see Luna.
例文
1. The astronauts piloted their craft down to the lunar surface.
宇宙飛行士が宇宙船を操縦して月面に着陸した。
2.The lunar stone is different from earth 's.
月の石と地球の違い。
3.The Spring Festival is the lunar New Year.
旧正月、つまり旧暦の新年。
4."Well I suppose it is based on the old lunar months isn 't it."-'Yes that 's right.'
「ああ、旧制陰暦で計算されていると思いますが、そうですか？」-「はい、そうです。」
5.When there is solar halo，it will rain；when there is lunar halo，it will blow.