IPA: /ˈdaɪər/
KK: /daɪər/
More serious or urgent than something else; indicating a situation that is extremely bad or severe.
The situation became direr as the storm approached the coast.
Direr is derived from the comparative form of the adjective "dire" (from Old French *dire*, meaning to say or tell). The suffix "-er" indicates a comparative degree. Thus, "direr" means more dire or more serious in nature.
Think of 'dire' as something serious or urgent, and remember that 'direr' means more serious or more urgent.