Spare is a versatile English word with multiple meanings:
1. As a verb: to refrain from harming or destroying something/someone ("Spare his life")
2. As an adjective: extra or additional ("spare tire", "spare key")
3. As a noun: an extra item kept for replacement ("car spare parts")
4. As an adjective: thin or lean ("a spare figure")
5. As a verb: to give up something as not strictly needed ("Can you spare a minute?")
6. In sports: a successful strike in bowling when all pins are knocked down in two attempts