Hablo español / castellano básico como parasobrevivir / salir adelante / comunicarme (could be one of the thousand ways to say it).
Comprende is the how you would say understand. Also entiende.
Basta
bastante
No entiendes esto?
no lo entenderías
I would hope to understand enough Spanish to answer.
"él no entiende" (he doesnt understand) or "él no puede entender" (he can not understand)
comprensión total
just say i dont understand
Ya basta
insuficiente dinero
Question is not clear enough to answer.