航空便: air mail

船便: surface mail, sea mail

檳榔: the areca or betel palm, Areca catechu

檳榔子: areca nut or betel nut, the seed of the areca or betel palm, Areca catechu; a dark red color used in dyeing

discolored spot or area / disgraceful matter

(informal) excitement

Heaven's net (from which nothing sinful can escape)

(historical) an era that began on 9 November 1681 (twenty-ninth day of the ninth month according to the Japanese calendar) and ended on 5 April 1684 (twenty-first day of the second month)

the inside of a store / in-store

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