Radical 囗
6 strokes
enclosed 囗 (24a) + mouth 口 (5) = return 回
This means to return to a place; hence also “to come back” in the sense of to respond or reply; or the number of times an action is repeated.
回来 (65) huílái to return (here)
回去 (86) huíqù to return (there)
[来回 (65) láihuí return (journey), there and back]

The tribe’s oracle mouth is displayed in the museum in an enclosed area; people keep returning to see it (because it’s so unusual). / The ghostly fairy conjures up a shimmering halo to protect it.