avoidable(a = adj.all) avertable, avertible, evitable - capable of being avoided or warded off;
Derived form verb avoid₂

1.  Capable of being vacated; liable to be annulled or made invalid; voidable. [1913 Webster]
"The charters were not avoidable for the king's nonage." [1913 Webster]

2.  Capable of being avoided, shunned, or escaped. [1913 Webster]