1. Stupidity; nonsense.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• aptise,
• betis,
• belise,
• belltike,
• bemise,
• betice,
• beties,
• vetise,
• netise,
• hetise,
• getise,
• bwtise,
• bstise,
• bdtise,
• brtise,
• b4tise,
• b3tise,
• berise,
• befise,
• betiss

• Betsey,
• Beets,
• beitz,
• bettes,
• BETTIS,
• Betts,
• beats,
• beads.

The adjective form of the word "betise" is "bêtise".

The plural form of the word "betise" is "betises".

The singular form of the word "betise" is "betise". It is a French word meaning foolishness or silliness, and it remains the same in singular and plural form.