beatable
bea·table
adjective
1.
susceptible to being defeated
Origin
From beat + -able, in the sense of "able to be bettered" as a back-formation from unbeatable.
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.