anochecer
/anot͡ʃeˈθeɾ/ · B2 · verb
to become night, to get dark
🌆🌙 anochecer = a- + noche + -ecer (to become): to become night
Built from noche (night) plus the verb-forming ending -ecer, meaning to become or grow. So anochecer literally means to grow night-ish: the day turns to night. Compare amanecer (to dawn), which follows the same pattern.