From Latin principium, beginning, foundation
Principle (moral rule) is often confused with principal (most important.) Consult both definitions if in doubt.
The confused may care to remember that 'The principal alphabetic principle places A before E' as a reminder of the relative spelling.
zh-min-nan:principle fa:principle fr:principle io:principle it:principle ku:principle hu:principle ja:principle pl:principle pt:principle ro:principle ru:principle simple:principle fi:principle ta:principle te:principle vi:principle tr:principle zh:principle