D defs.my
Entry 3 senses Webster, 1913

Trusty

/trŭs'-tē/ · Trust·y · IPA /ˈtɹʌsti/
01 a. Admitting of being safely trusted; justly deserving confidence; fit to be confided in; trustworthy; reliable.
  1. 1.
    Admitting of being safely trusted; justly deserving confidence; fit to be confided in; trustworthy; reliable.
    “Your trusty and most valiant servitor.” Shak.
  2. 2.
    Hence, not liable to fail; strong; firm.
    “His trusty sword he called to his aid.” Spenser.
  3. 3.
    Involving trust; as, a trusty business.[R.]