solifluction

[soh-luh-fluhk-shuh n, sol-uh-] /ˌsoʊ ləˈflʌk ʃən, ˌsɒl ə-/
noun, Geology
1.
creep (def 22a).
Origin
1915-20; < Latin sol(um) soil + -i- -i- + fluctiōn- a flowing (stem of fluctiō), equivalent to fluct(us) (see fluctuate) + -iōn- -ion
British Dictionary definitions for solifluction

solifluction

/ˈsɒlɪˌflʌkʃən; ˈsəʊlɪ-/
noun
1.
slow downhill movement of soil, saturated with meltwater, over a permanently frozen subsoil in tundra regions
Word Origin
C20: from Latin solum soil + fluctio act of flowing