Last updated at 14:26 BST, Friday, 17 April 2009

Prefixes and suffixes

Questions answered

Adjectival suffixes: '-ic', '-al'
'electric' or 'electrical'? Roger Woodham answers
Hyphenated adjectives
Massimo Vitale from Italy has three questions...
Job title suffixes
Is there a rule about when to use '-er' and when to use '-ist' at the end of a job title?
Negative prefixes:un,in,im,il,dis
Garnet Teo from Singapore asks about the difference between flammable and inflammable
Noun suffixes
Yee from Hong Kong finds out which suffixes we use to make nouns
Suffixes: - less, -free
'Sugarfree' or 'sugarless'? When to add 'less' and when to add '-free' to form an adjective