"shewing" in the verb sense
1. prove, demonstrate, establish, show, shew
establish the validity of something, as by an example, explanation or experiment
"The experiment demonstrated the instability of the compound"
"The mathematician showed the validity of the conjecture"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License