Proper

compleet

(informal: utter)

degelijk

(entitled to its name, true)

deugdelijk

(following the established standards of behavior or manners)

echt

(in the very strictest sense of the word)

echt

(entitled to its name, true)

eigen

(grammar: designating a particular person, place or thing)

eigen

(belonging to oneself or itself, own)

eigenlijk

(in the very strictest sense of the word)

gepast

(fit, suitable)

geschikt

(fit, suitable)

goed

(fit, suitable)

goed

(following the established standards of behavior or manners)

grondig

(complete, thorough)

juist

(fit, suitable)

keurig

(following the established standards of behavior or manners)

net

(following the established standards of behavior or manners)

volslagen

(informal: utter)

zelf

(in the very strictest sense of the word)