S: (v) shift (use a shift key on a keyboard) "She could not shift so all her letters are written in lower case"
S: (v) shift (change phonetically as part of a systematic historical change) "Grimm showed how the consonants shifted"
S: (v) shift (change gears) "you have to shift when you go down a steep hill"
S: (v) switch, shift, change (lay aside, abandon, or leave for another) "switch to a different brand of beer"; "She switched psychiatrists"; "The car changed lanes"
Adjective
S: (adj) shifting (continuously varying) "taffeta with shifting colors"
S: (adj) shifting, shifty (changing position or direction) "he drifted into the shifting crowd"; "their nervous shifting glances"; "shifty winds"