confirmconfirm

Confirm comes from Middle English confirmen, from Old French confermer, from Latin cōnfirmō ‘to strengthen’, from firmō, from firmus ‘firm’.

1. Latinc. 75 BCE–200 CEfirmus¹‘firm’
2. Latinc. 75 BCE–200 CEfirmō¹‘to make firm’
3. Latinc. 75 BCE–200 CEcōnfirmō¹‘to strengthen, establish’
4. Old Frenchc. 842–1400confermer¹
5. Middle Englishc. 1150–1500confirmen¹
6. Englishearliest quotation 1886confirm¹

1. ¹ Wiktionary, English confirm
2. Earliest quotation in Wiktionary’s entry: 1886, Peter Christen Asbjø￵rnsen, Folk and Fairy Tales: “She pulled through with the boy till he was…”.