As far as I can tell, the only source using "diaeresis" is The New Yorker. It's this weird little umlaut thing that I can't reproduce using this keyboard/OS, apparently to let people unfamiliar with familiar words know when a new syllable starts. Absent the ability to type it, I'll have to let the article explain it. The Curse of the Diaeresis Have you seen it before? Would you use it?