1. to want faith or confidence; to have or feel distrust ...1532 now rare
2. to distrust, to doubt, to suspect, to mistrust ...1678 obs.
from Latin diffidere to distrust, to be distrustful
FIRST DOCUMENTED USE
1532 - see EXAMPLE below
EXAMPLE (for vb.1.)
"...I diffided in the justness of the Matters,
and defence of the Conclusions."
From: Bonner's Letter about the Proceedings at Rome, Apr. 29, 1532
In: The History of the Reformation of the Church of England
By: Gilbert Burnet