What are prefixes and suffixes
(voorvoegsels and achtervoegsels)
A suffix is a word part added to the end of a word
(for example, -ful)
Adding the suffix -ful to the base word, help = helpful.
A prefix is a word part added to the beginning of a word or base word
(for example, un-)
Adding the prefix un- is added to helpful = unhelpful.