建設的

音読み

建:ケン 設:セツ 的:テキ

訓読み

建:た(てる) 設:もう(ける) 的:まと

建設的な意見をください。

Please give constructive opinions.

This is a set phrase — memorize it as a whole unit rather than analyzing each part. N2 vocabulary — this word appears in formal writing and news articles.