In a grave and sedate manner.
In other words to be polite.
If I shook someones hand solemnly I would shake their hand politely.
There are no perfect rhymes for the word solemnly.
Solemnly is an adverb.
i solemnly swear to tell the truth and nothing but the truth
She solemnly sat and ate her supper.
She solemnly stared out the window as she sat deep in thought about her past.
serious, intense, holy, divine
She solemnly sat on her bed and cried until she finally fell asleep.
Jokingly.
excitedly
Solemnly.
And I hereby solemnly declare that all those allow competitions in these sector are courageous persons.
The silent letter in "solemnly" is the "n". It is pronounced as "solem-ly" with the "n" being silent.