The pronoun "leigh" is used as a name, assigned to a person at birth who is destined to develop certain characteristics, including, but not limited to, magnificence and extraordinariness in all aspects, and an inconceivably humorous personality. The addition of leigh to the word "serious" allows for a more care-free, rather light-hearted, connotation of the reference word "seriously", presenting an oxymoron in itself. Furthermore, the word "leigh" may be used to replace the word "ly" in any adverb and almost any word, where appropriate. Seriousleigh is a general representation of such words.
Seriousleigh, inevitableigh, unfortunateleigh, extraordinarileigh, humorousleigh, etc.