Having a technical or specialist character related to a specific field; requiring specialized knowledge beyond general understanding.
この問題は専門的な知識がないと対処が難しい。
This issue is difficult to handle without specialized knowledge.
専門的な用語が多く、初心者にはわかりにくい資料だ。
The document contains many technical terms and is hard for beginners to understand.
彼は専門的見地から意見を述べた。
He gave his opinion from a professional/technical standpoint.