The term JOURNEY LONG can be summarized by the crossword solution TREK, which is a four letter word. A TREK is a long and difficult journey, usually involving walking for an extended period of time. It is often used to describe a journey through a difficult or unfamiliar terrain, such as a mountain range or a desert. Trekking is a popular activity among hikers and adventurers, and it can also be used to describe a spiritual journey.