front-line

Translations
передовой
фронтовой
находящийся на передовой
линия фронта
передовая
первой линии
Definitions
Relating to or situated at the area closest to enemy forces in a war.
Directly involved in the most important or demanding part of an activity.
Dealing directly with customers, patients, or the public rather than working in a support or administrative role.
Words
frontline

adjective
передовой