1. in a manner that shows no belief in or respect for God; without religious faith or piety
2. in a wicked or immoral manner; without moral principles

Examples

• He lived godlessly, rejecting all religious teachings and traditions.
• The character acted godlessly throughout the novel, showing no regard for ethical standards.
• She spoke godlessly about matters that many considered sacred.
• They pursued their ambitions godlessly, willing to harm others for personal gain.
• The film depicted a society that had become increasingly godless and godlessly indifferent to suffering.