mclarendillon
LOL! well thats why i said
trustee would more specifically be a person whom you entrust with something
as per the definition that you provided, it is used more often as a noun than a verb (4:1) :d
and secondly as the word trustee ends up with "ee" as a suffix, just like employee, lessee etc. etc. so automatically your mind takes it as a someone (i.e. a noun) rather than an activity ( verb)