More glad; happier or more pleased than before.
Comparative form of 'glad,' from Old English 'glæd' meaning bright or shining, which evolved to mean cheerful or pleased by the 12th century.
The word 'glad' originally meant 'smooth' and 'shining' in Old English—happiness was literally imagined as a bright, smooth feeling! The comparative 'gladder' shows how our emotions are described through visual metaphors.
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