intensifier
1. [ noun ] (grammar,linguistics) a modifier that has little meaning except to intensify the meaning it modifies
Synonyms: intensive
Examples:

"`up' in `finished up' is an intensifier" "`honestly' in `I honestly don't know' is an intensifier"

Related terms: modifier so just most such literally how ever in_truth honestly well positively mighty wonderfully downright all-fired living goddam every_last precious infernally madly intensify
Similar spelling:   intensified
  intensive
  intensify
  intensity
  intension
  intensifying
  intensely
  intensive_care
  intensively
  intensional
  intention
  intent_on
  intensiveness
  indemnity
  indemnify