rigorous, thorough, strict
Une approche plus rigoureuse est certainement possible.
A more rigorous approach is certainly possible.
Tu vas annuler ton enquête rigoureuse.
You're going to cancel your thorough investigation.
— Fight Club (1999)
L'entreprise est très rigoureuse avec le retard.
The company is very strict about lateness.
La police mène une enquête rigoureuse mais n'a encore rien trouvé.
The police are conducting a thorough investigation but have not found anything yet.
— Andhadhun (2018)