Trust″y (?), a. [Compar.Trustier (?); superl.Trustiest.] 1. Admitting of being safely trusted; justly deserving confidence; fit to be confided in; trustworthy; reliable.
Your trusty and most valiant servitor. Shak.
2. Hence, not liable to fail; strong; firm.
His trusty sword he called to his aid. Spenser.
3. Involving trust; as, a trusty business. Shak.