The kanji 乾乾 primarily conveys the meanings of "dry," "dried," "to dry," or "arid." It relates to a state of lacking moisture, the process of removing moisture, or a dry climate. The character can also relate to the concept of "heaven" or "sky" in a philosophical context.

・On-yomi (音読み): カン ・Kun-yomi (訓読み): かわ（く） (kawa(ku) - to dry), かわ（かす） (kawaka(su) - to dry something), いぬい (inui - a specific direction, northwest in some contexts)

⚫︎ 乾燥（かんそう） Translation: dryness, drying, desiccation ⚫︎ 乾電池（かんでんち） Translation: dry cell battery ⚫︎ 乾杯（かんぱい） Translation: cheers! (literally "dry cup")

The kanji 乾乾 is a phono-semantic compound (形声文字). It combines the semantic element of 乙 (otsu), which is a component referring to something small and delicate, with the phonetic element 干 (kan), which originally meant "to dry." The original meaning was likely to indicate something that is in a dry state. Over time, the character evolved to represent the broader concept of dryness.