1. the quality or state of being erratic; unpredictability or inconsistency in behavior, movement, or performance
Usage: formal; often used in academic or technical contexts

Examples

• The erraticism of the stock market made it difficult for investors to plan long-term strategies.
• Her erraticism in attendance caused problems for the team's scheduling.
• The patient's erraticism in mood swings suggested a need for psychiatric evaluation.
• Scientists studied the erraticism of the comet's orbit to predict its future path.
• The coach was frustrated by the erraticism of the player's performance from game to game.