"giving admonition, conveying a warning," late 15c., from Latin monitorius "admonishing," from monitus, past participle of monere "to admonish, warn, advise," from PIE *moneie- "to make think of, remind," suffixed (causative) form of root *men- (1) "to think."
shook a monitory finger at him
moniliform
monism
monist
monition
monitor
monitory
monk
monkey
monkey-bread
monkey-shines
monkey-wrench