from The American Heritage® Dictionary of the English Language, 4th Edition
- transitive v. To think very likely or almost certain; suppose. Used in the first person singular present tense: Will they be late? Yes, I daresay. I daresay you're wrong.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. to think that something is likely or probable
dare + say (Wiktionary)