This is the 9828th most frequent Russian word.
абонентской
"Абонентской" means "subscriber's" or "related to a subscriber."
In this case, 'абонентской' modifies 'program', indicating it is related to a subscriber or subscription-based service.
Компания предлагает новые условия абонентской программы.
The company offers new conditions for the subscription program.
Here, 'абонентской' describes the type of the line as being associated with subscription-based access.
Для использования абонентской линии необходимо подключение.
To use the subscriber line, a connection is required.
Here, 'абонентской' refers to the adjective form of 'subscriber's' or 'subscription-related', describing the fee type for services.