This is the 1623rd most frequent Japanese word.
柔らかく
Softly; gently.
In this sentence, "柔らかく" is used to describe the texture of the fabric as soft.
この布はとても柔らかくて気持ちがいい。
This fabric is very soft and feels good.
Here, "柔らかく" is used to describe the gentle manner of the smile.
彼は柔らかく微笑み、私たちを迎え入れた。
He smiled softly and welcomed us.
The term "柔らかく" in this usage describes the action of making the bread softer.