乾杯 (かんぱい)cheers; bottoms-up; prosit

cheers; bottoms-up; prositinterjection (kandoushi)
toast; drink (in celebration or in honor of something)noun (common) (futsuumeishi), noun or participle which takes the aux. verb suru
drinking one's glass drynoun (common) (futsuumeishi), noun or participle which takes the aux. verb suru

乾杯, its kanji, and other words that share them.Open this graph

Kanji in 乾杯

乾燥かんそうdryness; aridity
乾電池かんでんちdry cell; battery
乾かすかわかすto dry (clothes, etc.); to desiccate
乾きかわきdrying; dryness
乾くかわくto get dry
乾パンかんパンcracker; hard biscuit
乾季かんきdry season
乾期かんきdry season
一杯いっぱいamount necessary to fill a container (e.g. cupful, spoonful, etc.); drink (usu. alcoholic)
満杯まんぱいfull
杯さかずきsake cup; cup for alcoholic beverages
賜杯しはいEmperor's cup; trophy given by the Emperor
力一杯ちからいっぱいwith all one's strength; with might and main
祝杯しゅくはいtoast; congratulatory cup
精一杯せいいっぱいthe best one can do; one's best effort
腹一杯はらいっぱいfull stomach; bellyful

See how 乾杯 connects to the rest of Japanese.