principle
From LSJ
English > Greek (Woodhouse)
substantive
source, origin: P. and V. ἀρχή, ἡ.
legal principle: P. ὑπόθεσις, ἡ (Dem. 1082).
rule of action: P. προαίρεσις, ἡ.
standard: P. and V. κανών, ὁ, ὅρος, ὁ.
the principles and foundations of action: P. . τῶν πράξεων αἱ ἀρχαὶ καὶ αἱ ὑποθέσεις (Dem. 21).
this is the principle of democracy: P. τοῦτό ἐστι δημοτικόν (Dem. 436).
to govern on oligarchic principles: P. κατ' ὀλιγαρχίαν πολιτεύειν (absol.). (Thuc. 1, 19).
the cause and originating principle of existing things: P. τὸ αἴτιον καὶ τὸ ἀρχηγὸν τῶν ὄντων (Plato, Cratylus 401D).