1) trusty, faithful
1a) of persons who show themselves faithful in the transaction of business, the execution of commands, or the discharge of official duties
1b) one who kept his plighted faith, worthy of trust
1c) that can be relied on
2) easily persuaded
2a) believing, confiding, trusting
2b) in the NT one who trusts in God's promises
2b1) one who is convinced that Jesus has been raised from the dead
2b2) one who has become convinced that Jesus is the Messiah and author of salvation
Part of Speech: adjective
not tr 1; 67not tr 1; 67
Citing in TDNT: 6:174, 849
From G3982; objectively trustworthy; subjectively trustful: - believe (-ing, -r), faithful (-ly), sure, true.
These two sites give similar information, with the definition from several dictionaries and statistics on the use of the word.
Perseus Digital Library
University of Chicago's Logion lexicon
Thayer's dictionary plus other information.
From this site's dictionary (in Italian)
Click on the first column to search for that word as a form of the root πιστός; click on the second column to search for that grammatical form of the root πιστός; click on the third column to search for that word and grammatical form; click on the total to search for the root πιστός.