veinticinco
/beintiˈθinko/ · B2 · num
twenty-five
veinticinco = veinti (twenty) + cinco (five), sounds like 'bane-tea-SEEN-ko'
Spanish builds 21-29 as one word: veinte (twenty) shortens to veinti- and attaches to the digit. Here cinco means five, so veinti + cinco = twenty-five. Cinco is the same root as cinq in French and cinque in Italian.