substitute
UK: ˈsʌbstɪtjuːt | US: ˈsʌbstɪtuːt
n. a person or thing acting or serving in place of another
vt. to replace or exchange (someone or something) with another
vi. to act as a replacement
The word "substitute" originates from Latin substitutus, the past participle of substituere, meaning "to put in place of." It combines sub- (under/instead of) and statuere (to set or stand). The morpheme stit- (from stare, "to stand") reflects the idea of "standing in" for another. Over time, the term evolved in Middle English to denote replacement or delegation, retaining its core logic of one entity standing in place of another.
She served as a substitute teacher while the regular instructor was ill.
You can substitute olive oil for butter in this recipe.
The coach decided to substitute the tired player in the second half.
There’s no substitute for hard work when it comes to success.
The team used a temporary substitute until the new equipment arrived.