successfulness

Noun

uncountable

The state or condition of being successful.

Japanese Meaning

成功している状態 / 成功していること

Her successfulness in launching the product proved that careful planning pays off.

彼女の製品の立ち上げにおける成功は、綿密な計画が実を結ぶことを証明した。

Sense（1）

The state or condition of being successful.

The successfulness of a business depends on many things.