Use 'moribund' to describe something about to fail completely, often used for businesses or economies. The town's moribund steel industry has led to high unemployment.
Pro Tip 2/3
Lacking Vitality
'Moribund' implies a lack of activity or vigor, especially in cultural or artistic contexts. The once-thriving theater scene is now moribund.
Pro Tip 3/3
Metaphorically Dying
Use 'moribund' metaphorically to describe concepts or things that are outdated or obsolete. Cassette tapes are a moribund technology.