An adverb meaning certainly or undoubtedly; used to emphasize that something is true or correct.
彼はまさしくその事件の目撃者だった。
He was undoubtedly a witness to that incident.
これはまさしく私が探していた本だ。
This is exactly the book I was looking for.
彼女の説明はまさしく専門家のものだった。
Her explanation was truly that of an expert.
An adverb meaning just, precisely, or exactly; used to indicate an exact match in amount, timing, or description.
まさしくその瞬間、電話が鳴った。
At precisely that moment, the phone rang.
彼の予想はまさしく的中した。
His prediction hit the mark exactly.
これはまさしく彼女が求めていた解決策だ。
This is exactly the solution she was looking for.