austere

adj

Grim or severe in manner or appearance / Lacking decoration; trivial; not extravagant or gaudy

The austere teacher rarely smiled and always had a serious expression on his face.

意味（1）

Grim or severe in manner or appearance

The headmistress was an austere old woman.

意味（2）

Lacking decoration; trivial; not extravagant or gaudy

The interior of the church was as austere as the parishioners were dour.