[+idea, opinion] soutien m
[+person, candidate, institution] soutien m
→ The Pope has issued his full endorsement of the trade union movement.
endorsement for an idea soutien à une idée
→ there's also been an overwhelming endorsement for the idea of convening a constituent assembly.
to give endorsement to an idea apporter son soutien à une idée
→ He seemed to give US endorsement to the idea of mounting an air blockade