impulsive and imprudent; rash and unthinking
A rare yojijukugo describing a person or action that is hasty, thoughtless, and lacking careful judgment. Often used in formal or literary contexts to criticize poor decision-making.
His rash and thoughtless remark made the problem worse.
短慮軽率のそしりを免れない。
It is impossible to avoid the criticism of being impulsive and imprudent.
軽率 means 'rash' or 'thoughtless' and is more common. 短慮軽率 adds the nuance of being short-sighted (短慮) and is a stronger, rarer compound.
短慮 means 'short-sighted' or 'impetuous' and is also rare. 短慮軽率 combines both impetuousness and rashness.
A yojijukugo composed of 短慮 (short-sighted, impetuous) and 軽率 (rash, thoughtless). The exact historical derivation is uncertain, but it follows the typical pattern of combining two related two-kanji compounds to intensify the meaning.