This is the 11349th most frequent Polish word.
iluś
"Iluś" means "of some (unspecified) number" in English.
Here, 'iluś' introduces an indefinite amount of 'good advice', expressing that an unspecified quantity is requested.
Potrzebuję iluś dobrych rad, aby rozwiązać ten problem.
I need some good advice to solve this problem.
In this case, 'iluś' refers to an unspecified group of people who provided the warning, indicating indefiniteness.
Przez iluś ludzi zostałem ostrzeżony o niebezpieczeństwie.
I was warned about the danger by some people.
Here, 'iluś' denotes an indefinite number of acquaintances, emphasizing the lack of a precise number.