Third declension adjectives: ablative in -i or -e?© BrainMass Inc. brainmass.com September 21, 2018, 5:45 am ad1c9bdddf - https://brainmass.com/languages/latin/the-use-of-third-declension-adjectives-1688
Although 3rd declension nouns and adjectives share many of the same endings, one of the main differences is that the ablative singular of a noun (masculine, feminine or neuter) ends in -e, whereas the ablative singular of an adjective (masculine, feminine or neuter) ends in -i. This difference can be seen in the following sentence:
cum laude ingenti illud mihi dicit.
He said that ...