This is the 9878th most frequent German word.
nötigste
"The bare essentials" or "the most necessary."
In this sentence, 'nötigste' is used as a superlative adjective, emphasizing the most essential items needed, in this case, food.
Ich habe nur das nötigste Essen für die Woche gekauft.
I only bought the most necessary food for the week.
Here, 'Nötigste' functions as a noun derived from an adjective in its substantivized superlative form, referring to the pivotal items or essentials specifically for the trip.
Das Nötigste für die Reise ist schon gepackt.
The most necessary things for the trip are already packed.
In this context, 'Nötigste' again acts as a noun representing the fundamental items required in urgent situations like leaving a home.