This is the 4864th most frequent Russian word.
искренние
Sincere.
The word "искренние" is used to describe "слова" (words), conveying a sense of honesty and true feelings.
Её искренние слова произвели на нас глубокое впечатление.
Her sincere words deeply impressed us.
The word "искренние" is used to describe "друзья" (friends), emphasizing their honesty and openness in relationships.
Друзья должны быть искренними друг с другом.
Friends should be sincere with each other.
The word "искренне" is the adverbial form of "искренние," indicating the manner in which the feelings are expressed (with sincerity).