his explanation

His explanation really isn't clear.

Son explication n’est vraiment pas claire.

His explanation was not convincing.

Son explication n’était pas convaincante.

His explanation is not clear.

Son explication n’est pas claire.

His explanation wasn't satisfying.

Son explication n’était pas satisfaisante.

His explanation didn't come across well.

Son explication n’est pas bien passée.

His explanation was not satisfactory.

Son explication n’était pas satisfaisante.

His explanation doesn't make sense at all.

Son explication n’a absolument aucun sens.

We shouldn't accept his explanation at face value.

Nous ne devrions pas prendre ses explications pour argent comptant.

He was so drunk that his explanation did not make sense.

Il était tellement ivre que son explication n’avait aucun sens.