This is the 8287th most frequent Dutch word.
geringste
"Smallest" or "slightest."
In this sentence, 'geringste' means 'slightest' and serves intensification within negation to emphasize the lack of knowledge.
Ik heb geen geringste idee waar mijn sleutels zijn.
I have no slightest idea where my keys are.
Here, 'geringste' means 'smallest' and is used superlatively to highlight the minimal nature of the change.
Zelfs de geringste verandering kan een groot effect hebben.
Even the smallest change can have a big effect.
In this case, 'geringste' again acts as a superlative adjective, stressing the minimal threshold necessary to cause an effect.