improper
adjective/ĩpɾuˈpɾiu/medium
im·pró·pri·o
Definition
That is not proper, suitable, or convenient; inappropriate, unsuitable.
It would be improper to discuss that matter here.
The teacher reprimanded him for improper conduct.
Common collocations
improper behaviourimproper languageimproper time
Etymology
Do latim 'impropriu(m)', de 'in-' (negação) e 'proprius' (próprio).