semblèrent
Semblèrent is a French verb, specifically the third-person plural past historic (passé simple) of the verb "sembler." The passé simple is a literary tense primarily used in written narratives to describe actions that happened and concluded in the past. In common usage, the passé composé is more frequently employed for past events.
"Sembler" itself means "to seem," "to appear," or "to look like." Therefore, "semblèrent" translates to "they seemed,"
While the passé simple, and thus "semblèrent," is characteristic of formal writing, especially historical accounts, novels,