expression, adverb
as soon as possible; as quickly as possible; ASAP
A polite but direct request or statement of urgency; slightly softer than できるだけ早く. Commonly used in both spoken and written Japanese.
See also: 成るべく (なるべく)
なるべく早くご返事ください。
Please reply as soon as possible.
なるべく早く終わらせます。
I'll finish it as quickly as I can.
More emphatic and slightly more formal than なるべく早く; implies doing everything possible to be quick.
The adverbial part meaning 'as much as possible'; なるべく早く is a specific common collocation.
Phrase composed of なるべく (adverb meaning 'as much as possible', from the classical verb 成る 'to become' + べく 'should') and 早く (adverbial form of 早い 'early, fast').