We use prefixes in front of many words where the
base form doesn't exist by itself. For example,
incessant means 'without stopping' but there is no
such word as 'cessant' (although there is the verb
cease).
Here are some more examples:
- inflect
- intact
- immune
- disparage
- repeat
- impeccable
- impede
- unkempt
- unscathed
- uncalled-for
- immediate
- immaculate
- impeccable
