2 adverbs to describe how to indescribables

They were attractive people, of all ages and very friendly, rather like Italians, but with a queer indescribable racial difference.

Hardly had I done so, when one of the young men started in a gentle voice an utterly indescribable ditty.

2 adverbs to describe how to  indescribables  - Adverbs for  indescribables