dieciocho
/djeˈθjot͡ʃo/ · B2 · num
eighteen
🔢 dieciocho = diez (ten) + y + ocho (eight): 10 + 8 = 18
Spanish builds 16 to 19 as a fused form of diez + y + number. Dieci- is a shortened diez + i (from y, 'and'), and ocho means eight. Say it as 'ten-and-eight' to remember it. Compare diecisiete (17) and diecinueve (19).