long-lasting

[lawng-las-ting, -lah-sting, long-]
adjective
1.
enduring or existing for a long period of time: a long-lasting friendship.
2.
effective for a relatively long period of time: a long-lasting pain reliever.
3.
resisting the effects of wear or use over a long period: a long-lasting fabric used for work clothes.

Origin:
1520–30

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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WordNet
long-lasting

adjective
existing for a long time; "hopes for a durable peace"; "a long-lasting friendship" [syn: durable
WordNet® 3.0, © 2006 by Princeton University.
Cite This Source
Example sentences
These unique underground structures form during long-lasting lava flows.
The design wasn't long-lasting or safe, however, pushing inventors to create
  self-contained incandescent lights.
The effect upon petroleum-consuming countries was immediate, profound and
  long-lasting.
Moreover, studies have shown that later marriages tend to be unusually stable
  and long-lasting.
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