This is the 2153rd most frequent Arabic word.
ليسوا
"ليسوا" means "they are not" in English.
Here 'ليسوا' is used as a negation to indicate that the group (students) is not currently present, functioning as a negation for a plural group in the present tense.
ليسوا الطلاب حاضرين اليوم.
The students are not present today.
In this sentence, 'ليسوا' negates the affiliation of a group of people with a place, emphasizing the negation of relationship or origin.
ليسوا هؤلاء الأشخاص من المدينة.
These people are not from the city.
Here, 'ليسوا' is used to negate a state (knowing the answer) for a plural group, effectively providing context to the lack of knowledge among the group.