Észlelhették
Észlelhették is a Hungarian verb form. It is the conditional past tense of the verb észlelni, which means "to perceive," "to notice," or "to detect." The suffix "-het" indicates possibility or potential, while "-ttek" signifies the third-person plural past tense. Therefore, "észlelhették" translates to "they could have perceived," "they might have noticed," or "they may have detected." This form is used to express that a group of people had the potential or possibility to perceive or notice something in the past, but it does not confirm whether they actually did. It suggests a hypothetical situation or an unconfirmed observation. For instance, one might say "A szirént észlelelhették volna" which means "They could have heard the siren." The specific context in which "észlelhették" appears will determine the precise nuance of meaning, but the core idea remains a past potential for perception.