recklessness

Noun

uncountable usually

The state or quality of being reckless or heedless, of taking unnecessary risks.

Japanese Meaning

無謀さ / 軽率さ / 不用心な行動や危険を顧みない状態

The pilot's recklessness endangered everyone on the flight.

そのパイロットの無謀さは、機内の全員の安全を脅かした。

Sense（1）

The state or quality of being reckless or heedless, of taking unnecessary risks.

His recklessness repeatedly put him in danger.

recklessnesses

（ plural ）