Yes, exactly. Negative words 'sound' negative and vice versa. For example, wrong is a very strong: خطأ \khtta'a\ while right is a very soft: صح \sah\. The word for strong itself is strong: قوي \qawi\ while soft is: ناعم na'im.

Now try to guess for yourself which word is 'ugly' and which is 'beautiful':

/jameel/ جميل vs. /qabih/ قبيح