a change, alteration

to modify, alter, change

shift, change position etc. / shift, change gear

a shift (a change in position, the situation, or one's attitude) / shifting, changing gear on a car / a shift (change of workers)

(chiefly women's speech) first person singular pronoun: I, me

(computing) shift key (key on a personal computer or terminal keyboard)

(automotive) stick shift

time shifting (recording a broadcast)

(polite) first-person singular pronoun: I, me

a personal or private matter / (by extension) selfishness