Avoidable and Unavoidable

adjective

• Capable of being avoided or warded off.
  • synonyms: evitable, avertible, avertable

• (a.) Capable of being vacated; liable to be annulled or made invalid; voidable.
• (a.) Capable of being avoided, shunned or escaped.

adjective

• (adj.) ().
  • synonyms: ineluctable, inescapable

• (a.) Not voidable; incapable of being made null or void.
• (a.) Not avoidable; incapable of being shunned or prevented; inevitable; necessary; as, unavoidable troubles.