Spelling Bee Hive found 1 result for keystone. This page contains the same results as searching for that word in the app.
keystone - noun; Level 3; origin: English; pronunciation: kēˈstōn. the wedge-shaped masonry piece at the crown of an arch that locks the other pieces in place.
Spelling Bee Hive is an independent study resource. It is not affiliated with, sponsored by or endorsed by any spelling bee organiser, publisher or dictionary.