My Grammar and I (Or Should That Be 'Me'?): Old-School Ways to Sharpen Your English

All’s well that starts well…
Rule:  when  all  and  well  are  used  as  prefixes,  take  away  one  l  –  altogether,
welfare . But note that this is not the case with hyphenated words: all-embracing,
well-adjusted, well-bred .
The opposite of what I mean
The  prefixes  dis-,  il-,  im-,  in-,  ir-,  mis-  or  un-  create  words  that  mean  the
opposite of the root word (il-, ir- and im- are all variants of in-, used respectively
in  front  of  words  beginning  with  l,  r,  and  b,  m  or  p):  disobey,  illogical,
impossible, inapplicable, irresponsible, misunderstood, unattainable.
But be careful when a root word can take two or more of these prefixes, as the
resulting  words  will  have  subtly  or  completely  different  meanings:  Do  I