personalísimo
very personal
personal
personal
+
-ísimo
superlative suffix
Personalísimo means very personal and is formed by combining personal0 with the superlative suffix1 -ísimo1, indicating the highest degree of being personal.
adjective
- very personalVery personal or extremely individualEste es un asunto personalísimo que no quiero discutir. // This is a very personal matter that I don't want to discuss.