fuseră

IPA(Pronunciation)

これはルーマニア語動詞「fi」（である）の3人称複数単純完了形、すなわち「彼らは（既に）存在していた」という意味の活用形です。

English Meaning

third-person plural simple perfect indicative of fi: they have been

Când intrară în sală, fuseră surprinși de tăcere.

彼らが部屋に入ったとき、静けさに驚いた。

When they entered the hall, they were surprised by the silence.