from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To change one's mind.
from the GNU version of the Collaborative International Dictionary of English
- transitive v. To change the mind of (one's self).
from The Century Dictionary and Cyclopedia
- Not to be think.
un- + bethink (Wiktionary)
The poor lady! she'd look from one to th 't'other an' a body a 'must think she'd give in -- an' then she'd unbethink hersel 'again.