Source : Webster's Revised Unabridged Dictionary (1913)

-some \-some\ (-s[=o]m).
   A combining form or suffix from Gr. sw^ma (gen. sw`matos) the
   body; as in merosome, a body segment; cephalosome, etc.

-some \-some\ (-s[u^]m). [AS. -sum; akin to G. & OHG. -sam,
   Icel. samr, Goth. lustusams longed for. See {Same}, a., and
   cf. {Some}, a.]
   An adjective suffix having primarily the sense of like or
   same, and indicating a considerable degree of the thing or
   quality denoted in the first part of the compound; as in
   mettlesome, full of mettle or spirit; gladsome, full of
   gladness; winsome, blithesome, etc.