Keep your powder dry

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Meaning

Remain prepared and conserve resources until they are needed. A somewhat old-fashioned military metaphor, often used in politics, business, and finance. It advises preparedness, not aggression. Regional use: British and Irish historical context; now wider English.

Origin

The literal image is practical: early firearms depended on gunpowder that would fail when wet. The longer maxim Put your trust in God, my boys, and keep your powder dry is first securely documented in Oliver's Advice, a poem published under the name Fitz Stewart in The Dublin University Magazine in December 1834 and associated with William Blacker. The poem attributes the advice to Oliver Cromwell, but no contemporary 17th-century evidence confirms that Cromwell said it. The shortened expression later became a general metaphor for readiness and restraint.

Research Sources

  1. Oliver's Advice: a poem beginning 'The night is gathering gloomily' National Library of Ireland Sources database
  2. Keep your powder dry - meaning and origin The Phrase Finder

Variants

  • Keep one's powder dry
  • Keep the powder dry

Usage Examples

  • The campaign kept its powder dry until the final week, when undecided voters were paying attention.
  • With negotiations still uncertain, the company kept its powder dry and preserved its cash reserve.
  • Keep your powder dry until the inspectors publish their findings.

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