Meaning of なるべく in Japanese

Definition of なるべく

なるべく(narubeku) 【成るべく ·成る可く】

あいなるべくは(ainarubekuha) 【相成る可くは】

It's the prevention of migraines during daily life that's important, not dealing with migraines when they occur.

I want you to somehow resolve the situation as promptly and avoiding to cause trouble for my sister and those around us as much as possible.

I had tried to avoid thinking that as much as possible but as soon as I faced it I started to feel miserable.

I'm looking for a coat. I'm short so the length should be on the short side, and as refined a design as possible.

We should read as many books as possible.

なるべく早くはやく診察しんさつを受けたいのですが。

I'd like to come to see the doctor as soon as possible.

なるべく早くはやくご返事へんじいただければ幸いさいわいです。

I would appreciate a reply as soon as possible.

なるべく早くはやく、全額ぜんがくをご送金そうきんくださるようお願いしますおねがいします。

May we ask you to remit in full settlement at your earliest convenience?

なるべく安いやすいほうがいいです。

I would like the least expensive one.

Could you speak as slowly as possible?