You spell it terroriste.
The word "a" in Afrikaans is spelled as " 'n". This is used as the indefinite article in Afrikaans to mean "a" or "an".
nael
grys
"Brein" is the correct spelling for "brain" in Afrikaans.
twaalfduisend
pienk
asseblief
Argentinië
roofdier
besig
nege