  The physical origin of dielectric loss is shown to be sum of n number of
subunits relaxation of a molecule, where n=1,2,3.. For each subunit relaxation,
the idea of intermolecular dipole-dipole interactions triggered non-Debye
dipole, ($\bf G$)$_{n}$=((1-g$_d$)$\bf G$$_{0}$)$_{n}$, and the ensuing dual
dipole ($\bf G$$_{\pm}$)$_n$=($\bf G$$_0$$\pm$$\bf G$)$_n$, relaxation
processes is proposed, where $\bf G$$_{-}$=g$_{d}$$\bf G$$_{0}$, $\bf
G$$_{+}$=(2-g$_{d}$)$\bf G$$_{0}$, and $\bf G$$_{0}$ is a Debye dipole. Each
subunit motion is statistically highly independent process and discriminated by
Debye and non-Debye relaxation (NDR) time, where g$_d$ is an exponent 0<g$_d$<1
and signifies interaction strength with a redistribution and conservation of
Debye dielectric loss energy. The proposed concept provides a new insight for
the NDR and discloses the physical origin of $\alpha$, $\beta$, $\gamma$,
$\delta$ relaxations and excess wing of glass formers, plastic crystals, drugs,
etc., with an excellent agreement with experimental results.
