merecidísimo
very well-deserved
merecer
to deserve
+
-ido
past participle suffix
+
-ísimo
superlative suffix
Merecidísimo means very well-deserved and can be broken down into merecer0 (to deserve0), the past participle suffix -ido1, and the superlative suffix -ísimo2 (very or extremely2). So it literally means 'most deserved' or 'very well-deserved'.
adjective
- very well-deservedVery well-deserved or extremely deservedSu ascenso fue merecidísimo después de tantos años de trabajo duro. // His promotion was very well-deserved after so many years of hard work.