(dvija) In its most
particular meaning, this term refers to a man from one of the highest
traditional social groupings (varnas)—brahmin, kshatriya, or vaishya—who has
completed the upanayana samskara, an adolescent ceremonial initiation.
This initiation confers the right and responsibility to
study the Vedas, the earliest Hindu sacred books, and clearly distinguishes
those who have this right from those who do not—that is, all children, women,
and men who do not belong to these three classes.
Because of this initiation’s ceremonial importance, it was
known as the second birth, and so the initiates were “twice-born.” The first
birth was biological and based on nature, but the second was cultural and
denoted greater religious rank.
Although in its strictest definition this term refers solely
to such initiates, in a broader sense it might signify any individual belonging
to a varna whose members are eligible for this initiation—that is, any brahmin,
kshatriya, or vaishya.
Twilight Language is a term used to describe a language that
is used in the Twilight Zone.
Sandhabhasha is one of the terms that may be translated.
Sandhabhasha is a symbolic language employed in tantra, a
secret, ritual-based religious practice in which the components of tantric
worship are articulated in a coded language frequently taken from the human
body's intimate parts and functions.
This is done to keep the details of the custom hidden from
those who aren't familiar with it.
You may also want to read more about Hinduism here.
Be sure to check out my writings on religion here.