"sparest" in the adjective sense
1. spare, trim
thin and fit
"the spare figure of a marathon runner"
"a body kept trim by exercise"
2. excess, extra, redundant, spare, supererogatory, superfluous, supernumerary, surplus
more than is needed, desired, or required
"trying to lose excess weight"
"found some extra change lying on the dresser"
"yet another book on heraldry might be thought redundant"
"skills made redundant by technological advance"
"sleeping in the spare room"
"supernumerary ornamentation"
"it was supererogatory of her to gloat"
"delete superfluous (or unnecessary) words"
"extra ribs as well as other supernumerary internal parts"
"surplus cheese distributed to the needy"
3. spare, free
not taken up by scheduled activities
"a free hour between classes"
"spare time on my hands"
4. spare
kept in reserve especially for emergency use
"a reserve supply of food"
"a spare tire"
"spare parts"
5. bare, scanty, spare
lacking in magnitude or quantity
"a bare livelihood"
"a scanty harvest"
"a spare diet"
6. plain, bare, spare, unembellished, unornamented
lacking embellishment or ornamentation
"a plain hair style"
"unembellished white walls"
"functional architecture featuring stark unornamented concrete"
Source: WordNet® (An amazing lexical database of English)
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