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sustainable
adjective
able
to
continue
for
a
long
time
without
using
up
resources
or
causing
serious
harm
,
especially
to
the
environment
•
The
city
is
investing
in
sustainable
energy
like
wind
and
solar
power
.
The
city
is
investing
in
sustainable
energy
like
wind
and
solar
power
.
•
Farmers
are
learning
sustainable
ways
to
use
water
so
their
wells
never
run
dry
.
Farmers
are
learning
sustainable
ways
to
use
water
so
their
wells
never
run
dry
.
From
sustain
+
-able
,
first
recorded
in
the
mid-20th
century
in
the
context
of
environmental
discussions
.
adjective
able
to
be
continued
,
supported
,
or
defended
without
breaking
down
or
failing
•
The
manager
knew
the
current
workload
was
not
sustainable
and
hired
two
more
people
.
The
manager
knew
the
current
workload
was
not
sustainable
and
hired
two
more
people
.
•
Their
plan
is
only
sustainable
if
sales
double
in
the
next
year
.
Their
plan
is
only
sustainable
if
sales
double
in
the
next
year
.
Use
evolved
from
the
general
sense
of
"
support
"
or
"
uphold
"
dating
back
to
the
14th-century
Old
French
‘
sustain
’
and
Latin
‘
sustinere
’.
