The Collaborative International Dictionary of English v.0.48:
Trustful \Trust"ful\, a. 1. Full of trust; trusting. [1913 Webster] 2. Worthy of trust; faithful; trusty; trustworthy. [1913 Webster] -- Trust"ful*ly,adv. -- Trust"ful*ness, n. [1913 Webster]WordNet (r) 3.0 (2006):
trustful adj 1: inclined to believe or confide readily; full of trust; "great brown eye, true and trustful"- Nordhoff & Hall [syn: trustful, trusting] [ant: distrustful]