sparer (Adjective) — Thin and fit. ex. "the spare figure of a marathon runner"
sparer (Adjective) — More than is needed, desired, or required. ex. "sleeping in the spare room"
sparer (Adjective) — Not taken up by scheduled activities. ex. "spare time on my hands"
sparer (Adjective) — Kept in reserve especially for emergency use. ex. "a spare tire" ex. "spare parts"
sparer (Adjective) — Lacking in amplitude or quantity. ex. "a spare diet"
sparer (Adjective) — Lacking embellishment or ornamentation.
sparer (Adjective) — Very angry.
sparer (Noun) — Someone who refrains from injuring or destroying.