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Webster 1913 Edition
Begnaw
Be-gnaw′
,Verb.
 T.
 [
p. p. 
Begnawed
, (R.) 
Begnawn
.] [AS. 
begnagan
; pref. be- 
+ gnagan 
to gnaw.] To gnaw; to eat away; to corrode. 
The worm of conscience still 
begnaw 
thy soul. Shakespeare
Webster 1828 Edition
Begnaw
BEGNAW'
,Verb.
T.
 Definition 2025
begnaw
begnaw
English
Verb
begnaw (third-person singular simple present begnaws, present participle begnawing, simple past and past participle begnawed)
-  (transitive, archaic) To gnaw; to eat away at.
-  (Can we date this quote?) Shakespeare:
- The worm of conscience still begnaw thy soul.
 
-  1832, Thomas Holley Chivers, The Path of Sorrow, Or, The Lament of Youth: A Poem, page 90:
- […] that man might see, / What worm begnaws — that vital core concealing / All its vile, consumptive bane, […]
 
-  1860, William Hogarth: Painter, Engraver and Philosopher; Essays on the Man, the Work, and the Time, VII, A History of Hard Work, in The Cornhill Magazine, volume 2, issues 7-12, page 238:
- Above him hangs, all torn, tattered, and rat-begnawed, "A View of the Gold Mines of Peru."
 
 
-  (Can we date this quote?) Shakespeare:
References
- begnaw in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913