As the boat picked up speed, the coastline receded into the distance until finally it became invisible. The painful memories gradually receded in her mind.
to move further away into the distance, or to become less clear or less bright
potent
Surprise remains the terrorists' most potent weapon. The Berlin Wall was a potent symbol of the Cold War. This is a very potent drug and can have unpleasant side-effects.
actions are done in a hurry, sometimes without the necessary care or thought
contemplate
I'm contemplating leaving my job. Losing a child is just too awful to contemplate. I couldn't contemplate living on my own. He was contemplating his future