IPA: /naɪtˈlɔŋ/
KK: /naɪtˈlɔŋ/
Continuing or lasting for the entire duration of the night.
They danced nightlong at the festival.
For the entire duration of the night; continuously throughout the night.
We stayed up nightlong to finish the project before the deadline.
Nightlong → It is formed from "night" (from Old English "niht", meaning the period of darkness) and "long" (from Old English "lang", meaning of great duration). The word "nightlong" means lasting for the entire duration of the night.
Think of the word 'night' representing the time of darkness and 'long' indicating duration — together, they help you remember that 'nightlong' refers to something that lasts throughout the whole night.