-some

  1. A combining form or suffix from Gr. sw^ma (gen. sw`matos) the body; as in merosome, a body segment; cephalosome, etc.

a.

  1. 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.