DIARIST
Meaning of DIARIST in English
di ‧ a ‧ rist /ˈdaɪərəst, ˈdaɪərɪst $ ˈdaɪr-/ BrE AmE noun [countable]
someone who writes a diary, especially one that is later sold
Longman Dictionary of Contemporary English.
Longman - Словарь современного английского языка.
2012