This is the 11036th most frequent Russian word.
герметичны
Hermetically sealed or airtight.
The word 'герметичны' here describes the property of the containers as being tightly sealed.
Эти контейнеры герметичны для сохранения свежести продуктов.
These containers are hermetically sealed to preserve the freshness of the products.
In this context, 'герметичных' metaphorically means 'secret' or 'insulated from external influence'.
Обсуждения между лидерами проходили в герметичных условиях.
The discussions between leaders took place in airtight conditions.
Used here, 'герметичные' describes doors that are sealed tightly, preventing any leakage.