What it means
なるべく is an adverb meaning “as much as possible” or “whenever possible.” It expresses an effort to do something to the greatest practical extent, while allowing that circumstances may prevent it. It commonly appears before a verb and can also modify an adjective or another adverb.
Usage note
なるべく suggests a flexible effort rather than an absolute requirement. It is therefore softer than expressions meaning “without fail,” and it is often naturally translated as “whenever possible” depending on the context.
How to use it
私はなるべく階段を使います。
I use the stairs as much as possible.
私はなるべく階段を使う。
I use the stairs as much as possible.
Example sentences
健康のために、なるべく階段を使うようにしています。
For my health, I try to use the stairs whenever possible.
図書館の本は、なるべく早く返すようにしてください。
Please try to return library books as soon as possible.
旅行中は、なるべく地元の料理を食べてみたいです。
While traveling, I would like to try to eat local cuisine whenever possible.
仕事では、なるべく分