The Collaborative International Dictionary of English v.0.48:

Estovers \Es*to"vers\ ([e^]s*t[=o]"v[~e]rz), n. pl. [OF.
   estoveir, estovoir, necessary, necessity, need, prop. an
   infin. meaning to suit, be fit, be necessary. See Stover.]
   (Law)
   Necessaries or supplies; an allowance to a person out of an
   estate or other thing for support; as of wood to a tenant for
   life, etc., of sustenance to a man confined for felony out of
   his estate, or alimony to a woman divorced out of her
   husband's estate. --Blackstone.
   [1913 Webster]

   Common of estovers. See under Common, n.
      [1913 Webster]

Bouvier's Law Dictionary, Revised 6th Ed (1856):

ESTOVERS, estates. The right of taking necessary wood for the use or
furniture of a house or farm, from off another's estate. The word bote is
used synonymously with the word estovers. 2 Bl. Com. 35; Dane's Ab. Index,
h.t.; Woodf. L. & T. 232; 10 Wend. 639; 2 Bouv. Inst. n. 1652 57.