Clear and easy to understand; lucid and unambiguous.
彼の説明は明快で、誰もが理解できた。
His explanation was clear, and everyone could understand it.
明快な結論を出すために、データを整理した。
We organized the data to reach a clear conclusion.
作文の構成が明快だと読みやすい。
An essay is easier to read when its structure is clear.
彼女の返答は明快だったが、やや事務的に聞こえた。
Her reply was clear, but it sounded somewhat businesslike.