You need to add a group of letters to the end of a word to make a new word. For example, if the suffix ‘ing’ is added to the end of the word ‘look’, the new word is ‘looking’ - or the ...

Suffixes cause spelling changes. In the course of editing opinions, I often come across the words ‘firstly’ ‘secondly’ and ‘thirdly’. Their use is clearly bad form.