Being rash or thoughtless; acting hastily without sufficient consideration; lacking caution.
軽率な言動が原因で信用を失ってしまった。
He lost trust because of his rash words and actions.
結論を出す前に、軽率にならないようよく検討してください。
Before drawing a conclusion, please consider carefully so as not to be hasty.
軽率さと無謀さは似ているが、無謀はさらに危険を伴う。
Carelessness and recklessness are similar, but recklessness involves even greater danger.