infinitive
1. [ noun ] (grammar) the uninflected form of the verb
Related terms: verb split_infinitive
2. [ adjective ] formed with the infinitive
Examples:

"an infinitive phrase"

3. [ adjective ] (grammar) not having inflections to indicate tense
Synonyms: uninflected
Related terms: infinite
Similar spelling:   infinite
  infinitival
  infinitude
  infinitely
  infinity
  infiniteness
  infinitesimal
  inventive
  Inabinet
  inventively
  inoffensive