Word of the Day
"Diacritic" - noun & adjective 
Diacritic means (noun) a sign (e. g. an accent, diaeresis, aedilla) used to indicate different sounds or values of a letter; (adjective) = diacritical; distinguishing, distinctive.
Sentence: A few American words, such as 'naive' used to be printed and written with diacritic marks [in this case a diaeresis as naïve], but those are usually left out now. Modern typewriters and now wordprocessors simply don't print those letters without extra work.