"solemnise" in the verb sense
1. solemnize, solemnise
observe or perform with dignity or gravity
"The King solemnized this day of morning"
2. solemnize, solemnise
perform (the wedding ceremony) with proper ceremonies
3. solemnize, solemnise
make solemn and grave
"This ceremony solemnized our hearts"
Source: WordNet® (An amazing lexical database of English)
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