Good and important enough to spend time, effort, or money on.
"The community garden project was a worthwhile endeavor that brought our neighborhood together."
In plain English: Something worthwhile is worth your time and effort because it has real value.
"The long hike was definitely worthwhile because we reached the summit just in time for sunset."
Usage: Use worthwhile to describe activities that justify the investment of your time, energy, or resources because they yield significant value. It is often interchangeable with valuable but specifically emphasizes whether an endeavor merits being undertaken despite potential costs.
Worthwhile combines the adjective worth with the noun while. It originally meant something that is valuable enough to be spent on or enjoyed.