「安い」(yasui) is an い-adjective meaning "cheap" or "inexpensive." It describes the price of something and is the opposite of "高い" when referring to cost. For example, "安い服" (yasui fuku) means "cheap clothes."

「安い」(やすい)は「値段が安い」という意味のい形容詞です。「高い」の反対です。例：「安いペン。」