That's because "ph" is a combination of two letters to make a single sound
Using the IPA, an alphabet designed for writing down sounds of words, where one sound tends to correspond to one letter, "phlegm" is /ˈflɛm/ and "phlegmatic" is /fleɡˈma.tɪk/
From earlier (15c.) boh, coined to create a loud and startling sound. Compare Middle English bus! (“bang!”, interjection), Latin boō (“cry aloud, roar, shout”, verb), Ancient Greek βοάω (boáō, “shout”, verb).
What's with people constantly down voting your comments for using þorn? Even if i disagree with the exact reason you use it it makes no sense to downvote over a letter
This is Sütterlin, a form of handwriting taught between 1915 and 1941 in German schools, until it was banned by the Nazis because of their weird obsession with typefaces
No no, they meant "broken up" as in what happens to deorbited satellites