ADJ-GRADED
（指說話、寫作或舉止）自命不凡的，裝腔作勢的
If someone's way of speaking, writing, or behaving is portentous, they speak, write, or behave more seriously than necessary because they want to impress other people.
例句
There was nothing portentous or solemn about him. He was bubbling with humour.
他一點也不裝腔作勢或故作嚴肅，渾身散發著幽默。
...portentous prose.
矯揉的散文