sans réponse
His question remained unanswered.
Sa question est restée sans réponse.
Certain questions remained unanswered.
Certaines questions sont restées sans réponse.
There was still one unanswered request.
Il restait une demande sans réponse.
— Weathering with You (2019)
Many questions about Venus remain unanswered.
De nombreuses questions concernant Vénus restent sans réponse.
The question remains, unanswered.
La question demeure sans réponse.