to say the least
US /tə seɪ ðə liːst/
UK /tə seɪ ðə liːst/

1.
على أقل تقدير, على الأقل
used to indicate that one is understating something, or that the reality is more extreme or significant than what is being explicitly stated
:
•
The meeting was chaotic, to say the least.
كان الاجتماع فوضوياً، على أقل تقدير.
•
His performance was disappointing, to say the least.
كان أداؤه مخيباً للآمال، على أقل تقدير.