unqualified
definition
not having the necessary skills or knowledge to do something
example
Despite her enthusiasm, she was unqualified for the position due to her lack of experience.
synonyms
incompetentunskilledinadequate
word origin — The word 'unqualified' comes from the prefix 'un-' meaning 'not' and 'qualified' from the Latin 'qualificare', meaning 'to make of a certain quality'.