unfamiliarity

countable uncountable

Lack of familiarity; ignorance or inexperience.

Japanese Meaning

不慣れさ、慣れていない状態。 / 未経験、または経験不足な状態。

Her unfamiliarity with the software caused multiple delays during the project.

彼女がそのソフトウェアに不慣れだったため、プロジェクトで複数の遅れが生じた。

Sense（1）

Lack of familiarity; ignorance or inexperience.

Due to my unfamiliarity with the library's catalog system, it took several hours to find the book.

unfamiliarities

（ plural ）