This is the 16238th most frequent Russian word.
расстанутся
"Расстанутся" means "they will part" or "they will separate."
In this sentence, 'расстанутся' is used to describe the decision of a couple to separate if their views differ, highlighting a conditional future situation.
Пара решила, что если их мнения не совпадают, они расстанутся.
The couple decided that if their opinions don't match, they will part.
Here, 'расстанутся' is negated ('не расстанутся') to signify a promise of staying together, emphasizing commitment among friends.
Друзья пообещали, что после школы они не расстанутся.
The friends promised that after school they will not part.
In this context, 'расстанутся' conveys the act of willingly giving up or parting with an abstract concept, such as a dream or an achievement.