: of, relating to, or characteristic of a diary her diaristic tone.

Is diaristic a word?

Having the nature of, or in the style of, a diary. Pertaining to diaries or diarists; in the style of a diary.

What is a diaristic?

diaristic in American English

(ˌdaɪəˈrɪstɪk ) adjective. having the nature of, or in the style of, a diary.