# unmask one's batteries

> English word · Verb

## Definitions
1. To begin a decisive action, especially one that reveals one’s true strength or character.
2. Used other than figuratively or idiomatically: see unmask, battery.

## Etymology
From the revealing of artillery previously concealed from the enemy’s line of sight, immediately before opening fire.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/unmask-one-s-batteries