This is the 4566th most frequent Swedish word.
återstående
"Remaining" or "left."
Here, 'återstående' qualifies 'days', referring to the days left or available.
De återstående dagarna kan användas för att planera.
The remaining days can be used for planning.
Here, 'återstående' is used as an adjective meaning 'remaining' to describe the work left to be done.
Det återstående arbetet ska bli klart imorgon.
The remaining work will be finished tomorrow.
In this sentence, 'återstående' modifies 'questions', indicating the ones that have not been handled yet.