This is the 1331st most frequent Dutch word.
onnodig
Unnecessary.
Here, 'onnodig' is used to describe an action (going) that is not required due to the circumstances.
Het is onnodig om nu te gaan, omdat de winkel gesloten is.
It is unnecessary to go now because the store is closed.
In this sentence, 'onnodig' qualifies 'lawaai' (noise), suggesting the noise serves no helpful purpose and is redundant in the context.
Onnodig lawaai kan de concentratie verstoren.
Unnecessary noise can disrupt concentration.
'Onnodige' in this case describes the mistake, indicating it could have been avoided with proper attention.