extensity

uncountable countable

(uncountable) The state of being extensive or of having extension / (countable) The degree to which something is extensive

Japanese Meaning

広がり、拡がっている状態 / 広がりの程度、拡がり具合

The extensity of the forest surprised the researchers, stretching farther than any map had shown.

その森の広がりは研究者たちを驚かせ、地図に示されていたよりもはるかに遠くまで続いていた。

Sense（1）

(uncountable) The state of being extensive or of having extension

Sense（2）

(countable) The degree to which something is extensive

extensities

（ plural ）