Usage examples for toughness:
-
When
this
is
done
the
bone
loses
its
toughness
and
becomes
quite
brittle.
"Physiology and Hygiene for Secondary Schools", Francis M. Walters, A.M.
-
The
tissues
of
the
body
have
not
yet
gained
the
toughness
that
they
will
gain
at
a
later
time.
"Parent and Child Vol. III., Child Study and Training", Mosiah Hall
-
In
spite
of
his
age
and
probable
toughness
I
was
tempted
to
see
if
I
could
get
any
steaks
out
of
him,
to
form
a
supply
of
food
should
our
stock
of
meat
not
be
sufficient
to
last
us
till
we
could
get
home.
"In the Wilds of Africa", W.H.G. Kingston
-
The
most
important
of
these
essential
properties
are
as
follows:
1.
Of
osseous
tissue,
hardness,
stiffness,
and
toughness
"Physiology and Hygiene for Secondary Schools", Francis M. Walters, A.M.