He finally unmasked his batteries and showed everyone his true skills.
unmask one's batteries
idiomTo begin a decisive action, especially one that reveals one’s true strength or character.
Origin
disputed originFrom the revealing of artillery previously concealed from the enemy’s line of sight, immediately before opening fire.
During the final debate, the candidate unmasked his batteries and presented a bold plan that surprised his opponents.
After months of careful preparation, the general finally unmasked his batteries, launching a decisive offensive that completely changed the course of the war.
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abound in one's own sense
To follow one’s own inclinations and opinions.
- 02
ace up one's sleeve
A surprise advantage of which others are not aware.
- 03
act one's age
To behave in a manner appropriate to one's age.
- 04
act one's age, not one's shoe size
Synonym of act one's age (“to behave in a mature manner; to avoid being childish”).
- 05
afraid of one's own shadow
Exceptionally timid.
- 06
air one's dirty laundry in public
To reveal one's sordid secrets to the public.
- 07
air one's dirty linen in public
Synonym of air one's dirty laundry in public.
- 08
albatross around one's neck
A characteristic, possession, associate, or previous deed that hinders one's ability to succeed.
Last updated July 12, 2026