ASSEVERATE [\uh-SEV-uh-rayt\] , transitive verb;
1. To affirm or declare positively or earnestly.
My Sentence:
I stand up for a friend's principle and asseverated for his responsible action towards making a decision that will not compromise his future by not putting another human life in jeopardy.
Origin:
Asseverate comes from Latin asseverare, "to assert seriously or earnestly," from ad- + severus, "severe, serious."
Source: Online Dictionary