An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

1) Of, pertaining to, or characterized by intensity.
2) Tending to intensify; intensifying.
3) Requiring or having a high concentration of a specified quality or element (used in combination).
4) Grammar: Indicating increased emphasis or force. "Certainly" is an intensive adverb. "Myself," in I did it myself, is an intensive pronoun (Dictionary.com).

→ intense; → -ive.

A prefix that highly emphasizes roots of words to which it is attached. In other words, intensive prefixes heighten the force of the primary meanings of words. These prefixes can effectively be translated as "thoroughly" to highlight their intensive function. For example the prefixes → re-, → de-, and → com-.

→ intensive; → prefix.