TRI, a prefix in words of Greek and Latin origin, signifies three.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI
tri
Founding-era definition · Webster's 1828 American Dictionary
More founding-era words: liberty · virtue · republic · justice · providence · commerce · militia · arms · prudence · establishment · religion · usurpation · tyranny · citizen · unalienable · sovereign