ach-laut

ach-laut

(ˈæklaʊt; ˈæx-)
n
(Phonetics & Phonology) (sometimes capital) phonetics the voiceless velar fricative sound that is written as ch in Scottish loch or in German ach, often allophonic with the ich-laut. See also ich-laut
[from German, from ach ah + Laut sound]