Read the dictionary definition of spare. All definitions for this word.
1. a score in tenpins; knocking down all ten after rolling two balls
2. an extra car wheel and tire for a four-wheel vehicle
3. an extra component of a machine or other apparatus
4. use frugally or carefully
5. give up what is not strictly needed
1. he asked if they could spare one of their horses to speed his journey
6. refrain from harming
7. save or relieve from an experience or action
1. I'll spare you from having to apologize formally
8. lacking embellishment or ornamentation
1. a plain hair style
2. unembellished white walls
3. functional architecture featuring stark unornamented concrete
9. lacking in magnitude or quantity
1. a bare livelihood
2. a scanty harvest
3. a spare diet
10. thin and fit
1. the spare figure of a marathon runner
2. a body kept trim by exercise
11. more than is needed, desired, or required
1. trying to lose excess weight
2. found some extra change lying on the dresser
3. yet another book on heraldry might be thought redundant
4. skills made redundant by technological advance
5. sleeping in the spare room
6. supernumerary ornamentation
7. it was supererogatory of her to gloat
8. delete superfluous (or unnecessary) words
9. extra ribs as well as other supernumerary internal parts
10. surplus cheese distributed to the needy
12. kept in reserve especially for emergency use
1. a reserve supply of food
2. a spare tire
3. spare parts
13. not taken up by scheduled activities
1. a free hour between classes
2. spare time on my hands