the other celestial spheres moved
in
circular orbit, and the case forms
of
a nomen (noun
or
adjective) were radii
in
the upper right-hand
quadrant
of
a circle.
The nominative case
was
considered to be the vertical radius; the
others, oblique radii, that is, neither vertical nor horizontal. The
nominative
was
therefore known as the "upright" case (casus rectus)
and the others,
as
the "oblique" cases (casus obliqui).
The term case (casus) comes from the verb
"to
fall," the idea
being that when
you
ran through the complete set
of
case fonns
of
a
nomen, you started from straight up and down in the nominative
and fell precipitously through the vocative, genitive, dative, accusa-
tive, and (in Latin) ablative, coming to a crashing halt at fourteen
past the hour, and
not
a moment too soon. This makes the upright
case a contradiction in terms,
of
course,
but
what right-thinking
Pythagorean, having come this far,
is
going to quibble? -
The process
of
running-or
falling-through the complete set
of
case forms for a nomen was called "declining":
to
decline
is
to
turn
away from,
in
this instance, to turn away from the nominative and
make a break for it along the perimeter. To turn down, we might
say. In any event,
if
Latin has
five
declensions, this means that there
are
five
possible tracks around the nominal circle.
We
will have a
look at two
of
them here.
The first declension
is
probably so named because it
is
the most
straightforward and, therefore, the one
you
get
to
hear
about
first
in
a Latin grammar. Samples
of
first declension nouns are:
SINGULAR
FEM
FEM
NOM
matella
insula
VOC
matella
insula
GEN matellae
insulae
DAT matellae
insulae
ACC
matellam
insulam
ABL matella
insula
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