乾かす
かわかす · kawakasu · JLPT N3 · verb-godan
to dry
👕☀️ 乾 as in 乾杯 kanpai: dry the glass. 乾かす = make something dry
乾く (kawaku) means to become dry. Swapping the ending to -kasu makes it something you do to an object: 乾かす = to dry it. You already know 乾 from 乾杯 (kanpai, cheers), which literally means drain the glass dry.