posted by nanbala .
when and where i.e words we should use the sufix mis,-mal,-im,ir
Those are prefixes, not suffixes, aren't they? They come at the BEGINNING of words; here are some examples:
(2 different meanings in those two)
Look up these words at http://www.answers.com and/or http://www.onelook.com
At OneLook, you can also search like this, including the asterisk:
All of these four prefixes will give a word a negative meaning or an opposite meaning to what the root word means.