This is the 5246th most frequent Japanese word.
飾ら
"飾ら" is a conjugated form of the verb "飾る," meaning "to decorate" or "to adorn."
In this sentence, '飾られている' is a passive form, indicating that the room is being decorated by the flowers.
彼女の部屋には美しい花が飾られている。
Her room is decorated with beautiful flowers.
Here, '飾らない' functions as an adjective describing an attitude that avoids pretentiousness or adornments.
彼は真面目になるために飾らない態度を取った。
He took an unadorned attitude to be sincere.
In this example, '飾られました' conjugates into the polite past tense, showing that the act of decorating was performed by the teacher.