"to interfere, to meddle" is Вмешиваться in Russian.
Вмешиваться means "to interfere, to meddle" in English.
Listen to the pronunciationWord #3287 of 4,000 by frequency in Russian — level B2.
Не стоит вмешиваться в чужие семейные дела.
One shouldn't interfere in other people's family matters.