descriptive, noun · just like; as if; resembling someone or something to a high degree

他年纪不大，说话的口气俨然是个大人。

descriptive · neatly laid out; orderly; well-arranged

放眼望去，这里的街道整齐，屋舍俨然，十分宁静。

descriptive · solemn; dignified; majestic in appearance

他正襟危坐，神色俨然。