Present participle of accouter; the act of equipping or dressing someone with gear or accessories.
From accouter plus -ing. The -ing suffix creates the present participle form used in progressive tenses and as a gerund.
In historical texts about soldiers, you'll see 'accoutring the troops' describing the process of issuing uniforms and weapons—it's a word that captures both the practical and ceremonial aspects of military preparation.
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