in_vain
1. [ adverb ] to no avail
Synonyms: vainly
Examples:

"he looked for her in vain" "the city fathers tried vainly to find a solution"

Related terms: bootless bootless
Similar spelling:   invent
  invincibly
  invincible
  inventor
  invented
  inventory
  inventive
  invention
  infinity
  infinite
  Inabinet