Webster's Revised Unabridged Dictionary · 1913

Bethink

Bethink ({not transcribed}) , transitive verb

[Anglo-Saxon beþencan; pref. be- + þencan to think. See Think.]

To call to mind; to recall or bring to recollection, reflection, or consideration; to think; to consider; -- generally followed by a reflexive pronoun, often with of or that before the subject of thought.
I have bethought me of another fault. — Shakespeare
The rest... may... bethink themselves, and recover. — Milton
We bethink a means to break it off. — Shakespeare

Bethink , intransitive verb

To think; to recollect; to consider.
Bethink ere thou dismiss us. — Byron