This is the 15357th most frequent German word.
verbindliche
"Verbindliche" means "binding" or "obligatory" in English.
Here, 'verbindlichen' describes 'Regeln' (rules) as mandatory or obligatory to follow.
Die verbindlichen Regeln helfen uns, im Team erfolgreich zu arbeiten.
The binding rules help us work successfully as a team.
In this sentence, 'verbindliche' qualifies 'Zusage' (commitment) as a firm and definite promise.
Seine verbindliche Zusage hat das Projekt vorangebracht.
His binding commitment advanced the project.
The word 'verbindliche' here is used to describe a 'Art' (manner), indicating a cooperative and forthcoming disposition.