Phonotactics are a set of clearly defined rules that govern how sounds interact with each other in a language, more specifically what sounds can be near other sounds and in what order they can be in. Of course in order to have rules about sounds you must have the sounds themselves first, the phonetics, but the phonotactics give the language a clearly individualized sound just as much so if not even more than the phonetics itself.
The structure of sadreil will be (c)(c)(v)(v)(v)(c). Broken down, this means that:
Note: /w/ and /j/ are both technically semivowels
Onset Sounds: Anything consonants! (this includes semivowels/glides, /w/ and /j/)
Nucleus Sounds: All vowels and semivowels/glides!
Coda Sounds: SOME consonants! NO GLIDES/SEMIVOWELS (Any vowel can end a morpheme)