Resembling or characteristic of a glade; open, bright, and woodland-like.
From 'glade' (an open space in a forest, from Old English 'glæd' meaning bright) plus '-like' suffix meaning resembling.
A 'glade' is literally a 'bright place' in the forest—when you describe something as 'gladelike,' you're saying it has that magical quality of sudden openness and light, which is why glades feature so heavily in fantasy literature.
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