aniversario
/anibeɾˈsaɾjo/ · B1 · noun · m
anniversary
🎂 Latin annus (year) + versus (turned): the day the year comes back around
Almost identical to English anniversary, but Spanish spells it with one n and a b-like v: a-ni-ver-SA-rio. Año (year) is hiding in it. In some regions it also means a birthday, though cumpleaños is the usual word.