adjective. ['ˈʃɪftɪŋ'] continuously varying.
adjective. ['ˈʃɪftɪŋ'] (of soil) unstable.
adjective. ['ˈʃɪftɪŋ'] changing position or direction.
noun. ['ˈʃɪftɪŋ'] the act of moving from one place to another.