trustee / trusty are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
trustee: (noun) a person (or institution) to whom legal title to property is entrusted to use for another's benefit.
trusty: (noun) a convict who is considered trustworthy and granted special privileges.
trustee: t·r·AH·s·t·IY
trusty: t·r·AH·s·t·iy
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)