This is the 412th most frequent Dutch word.
ergens
"Ergens" means "somewhere" or "anywhere" in English.
In this example, 'ergens' implies a partial agreement or acknowledgment in the situation.
Hij heeft ergens wel gelijk in die kwestie.
He is somewhat right in that matter.
In this context, 'ergens' indicates an unspecified place where the keys were left.
Ik heb ergens mijn sleutels laten liggen.
I have left my keys somewhere.
Here, 'ergens' expresses an uncertain or vague feeling or thought.