an upward slope or incline of a hill, path, or terrain
acclivity
[noun]
Ex:
We
chose
the
gentler
acclivity
to
reach
the
ridge
.
abyss
[noun]
a very deep or seemingly bottomless hole or gorge in the earth or sea
Ex:
A
narrow
bridge
stretched
across
the
abyss
of
the
deep
canyon
.
aperture
[noun]
a hole, gap, or slit in a structure or surface
Ex:
Moss
grew
around
the
tree
's
bark
apertures
,
where
water
pooled
.
cant
[noun]
raised outer edge of a curved road or track above the inner edge to counteract centrifugal force
Ex:
chasm
[noun]
a deep fissure carved into the earth's surface
Ex:
Geologists
mapped
the
chasm
to
study
tectonic
activity
.
cleft
[noun]
a fissure in a surface or natural formation
Ex:
She
slipped
her
hand
into
a
cleft
between
the
boulders
to
steady
herself
.
confluence
[noun]
the specific location where two or more streams or rivers physically unite
Ex:
Canoeists
launched
their
vessels
from
the
sandy
shore
at
the
confluence
of
the
creeks
.
fissure
[noun]
(in geology) a narrow break or crack that partially divides a rock or surface without completely separating it
Ex:
The
tectonic
plates
pulled apart
,
causing
a
new
fissure
to
emerge
in
the
earth
's
surface
.
untrodden
[adjective]
not traversed by foot
Ex:
Satellite
images
revealed
patches
of
rainforest
still
untrodden
by
researchers
.
crevice
[noun]
a narrow crack or fissure in a surface, often found in rocks, walls, or other solid structures
Ex:
In
mountain climbing
,
climbers
use
specialized
equipment
to
navigate
crevices
and
cliffs
safely
.
declivity
[noun]
a downward slope or incline, often gradual or curved
Ex:
The
valley
was
shaped
by
a
wide
declivity
.
terra firma
[noun]
solid earth beneath one's feet, especially as contrasted with water or air
Ex:
Explorers
felt
a
rush
of
relief
upon
stepping
onto
terra firma
after
the
glacier
trek
.