1. comparative form of insane; more insane; more mentally ill or irrational
Usage: comparative degree of the adjective 'insane'

Examples

• His behavior became insaner as the stress increased.
• That plan sounds even insaner than the last one.
• The insaner the idea, the more he seemed to like it.
• She thought his obsession was getting insaner every day.
• The insaner he acted, the more concerned his family became.
• That's the insaner of the two proposals we discussed.