What is the meaning of かう?

迦烏, 加烏: a score of nine in certain kinds of card gambling: カブ (kabu) in modern Japanese

寡雨: little rainfall, limited precipitation

花雨: a rain of flowers; rain falling on flowers

飼う: to keep (an animal)

買う, 代う, 換う: to buy something

代う, 換う, 替う: to exchange something

交う: to take turns, to mingle together; to exchange, to mix

肯う: to affirm, to consent to something, to approve something

支う: to support something; to bolt or lock something

花雨: to rain flowers

Source: wiktionary.org