Wordnet 3.0
ADJECTIVE (2)
1. 
 subject to being conquered or overcome; 
- Example: "knew her fears were ultimately conquerable"2. 
 capable of being surmounted or excelled; 
[syn: conquerable, superable]
The Collaborative International Dictionary of English v.0.48:
Conquerable \Con*quer*a*ble\ (k[o^][ng]"k[~e]r*[.a]*b'l), a.
   Capable of being conquered or subdued. --South. --
   Con"quer*a*ble*ness, n.
   [1913 Webster]
WordNet (r) 3.0 (2006):
conquerable
    adj 1: subject to being conquered or overcome; "knew her fears
           were ultimately conquerable" [ant: unconquerable]
    2: capable of being surmounted or excelled [syn: conquerable,
       superable]