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Webster 1913 Edition
Trusty
Trust′y
,Adj.
 [
Com
par.
 Trustier
; sup
erl.
 Trustiest
.] 1. 
Admitting of being safely trusted; justly deserving confidence; fit to be confided in; trustworthy; reliable. 
Your 
trusty 
and most valiant servitor. Shakespeare
2. 
Hence, not liable to fail; strong; firm. 
His 
trusty 
sword he called to his aid. Spenser.
3. 
Involving trust; 
as, a 
. trusty 
business[R.] 
Shak.
 Webster 1828 Edition
Trusty
TRUST'Y
,Adj.
  1.
  That will not fail; strong; firm; as a trusty sword.Definition 2025
trusty
trusty
English
Adjective
trusty (comparative trustier, superlative trustiest)
- Reliable or trustworthy.
 
Noun
trusty (plural trusties)
-  A trusted person, especially a prisoner who has been granted special privileges.
-  1941, James Howell Street, In my father's house
- We usta have a rule that if a trusty shot an escaping convict, then the trusty would go free.
 
 -  1953, Raymond Chandler, The Long Goodbye, Penguin 2010, p. 58:
- The cell block is clean and doesn't smell of disinfectant. The trusties do all the work. The supply of trusties is always ample.
 
 
 -  1941, James Howell Street, In my father's house