Spelling Coach - Raphael's Fun Spelling Tips & Tricks

When adding a prefix that ends in the same (consonant) letter as the first letter of the root word, or adding a suffix that starts with the same (consonant) letter as the last letter in the root word - don't be tempted to drop one of those letters. Some of these spellings may look awkward, but don't be fooled. This goes along with tip 8. Don't change the root word when adding a prefix. Look at these frequently misspelled words:

adding a prefix:

un+necessary = unnecessary
in+numerable = innumerable
mis+spell = misspell (as we've said before - don't misspell this one!)
in+nocuous = innocuous

adding a sufix:

cool+ly = coolly
drunken+ness = drunkenness hotel+less = hotelless

Same goes for compound words:

book+keeper = bookkeeper
rough+hewn = roughhewn