frication

[fri-key-shuh n] /frɪˈkeɪ ʃən/
noun, Phonetics
1.
an audible, constrained rush of air accompanying and characteristic of fricatives.
Origin
1525-35; < Latin fricātiōn- (stem of fricātiō), equivalent to fricāt(us) rubbed (past participle of fricāre; see friction) + -iōn- -ion