This adjective describes someone or something blameless, without fault or blemish. In 2 Peter 3:14, believers should be diligent to be found 'blameless' in God's sight. Classical Greek used it for faultless persons, writings, and unblemished sacrificial victims. The multilingual glosses (Spanish 'sin-defecto', German 'untadelig') emphasize absence of flaw. Peter connects blamelessness with eschatological urgency: knowing heaven and earth will be dissolved should motivate holy living, being found without spot or blame when Christ returns.