principial
/prɪnˈsɪpɪəl/adjective
Chiefly Theology and Philosophy. Constituting a source or origin; primary, original; basic, fundamental.
- Apparently unrecorded between the 17th and late 19th centuries..
Origin
Early 17th century (in an earlier sense). Probably from classical Latin principiālis of or belonging to the beginning, of or belonging to elements (Lucretius) from principium + -ālis.