unfattenable

comparative more unfattenable · superlative most unfattenable

1. That cannot be fattened.

   The cow is a large, raw, high-boned, unfattenable animal, and being regularly wrought in the cultivation of the soil the milk is bad.

   1854, William Graham, The Jordan and the Rhine; or, The East and the West, page 46

   1 more example

   Of the many explanations that have been put forward one is that the unfattenable person consumes the calories by much greater muscular energy than the fattenable person.

   1963, Home Economics, volume 9, page 6