Word

海底撈月

かいていろうげつ
totally useless (fruitless) effort; wasting time on an impossible task (like trying to scoop up a reflected moon from the bottom of the sea)
Word

皆既月食

かいきげっしょく
total eclipse of the moon
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月割り

つきわり
per month; monthly installment plan; monthly instalment plan
Word

雲間に現れた月

くもまにあらわれたつき
moon peeping from behind the clouds
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月中

つきなか
middle of the month; mid-month
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一ヶ月

一か月、一箇月、一ケ月、1ヶ月、1か月、1ケ月
いっかげつ
one month
Word

月と鼈

月とすっぽん
exp
つきとすっぽん
like chalk and cheese (superficially similar, but completely different) (the moon and a turtle shell are both round, but they are otherwise completely different); like day and night; like the difference between heaven and hell
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月長石

げっちょうせき
moonstone
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月中旬

suf
げつちゅうじゅん
middle of the month; mid-month
Word

月中ば

つきなかば
middle of the month; mid-month