This is the 497th most frequent Arabic word.
سوى
Except, only, or just.
In this sentence, 'سوى' is used as "only," indicating exclusivity.
لم أكن أعلم سوى الحقيقة.
I only knew the truth.
Here, 'سوى' is used as "but," indicating limitation.
ما سوى هذا الخيار غير ممكن.
Nothing but this option is possible.
In this instance, 'سوى' acts as "except," denoting exception.