cap-a-pie

Etymology
From (Modern 🇨🇬).

Adverb

 * 1) From head to toe, especially of armor or other military accoutrements.
 * 2) * 1661–67,, The Dangers of an Honest Man in much Company:
 * If twenty thousand naked Americans were not able to resist the assaults of but twenty well-armed Spaniards, I see little possibility for one honest man to defend himself against twenty thousand knaves, who are all furnished cap-a-pie with the defensive arms of worldly prudence, and the offensive, too, of craft and malice.
 * 1) * 1808–10,, Memoirs of a Georgian Rake, Folio Society 1995, p. 129:
 * I sallied forth cap-à-pie in my Madras regimentals, intending to accompany Brent to Westminster Abbey, and to take a coach at the first stand we came to.