1. (non-productive) used with certain words to add a notion similar to those conveyed by with, together, or joint
    congenial, congregation, console, consonant, construct, converge, etc.
  2. (non-productive) used with certain words to intensify their meaning
  1. attached to certain words to obtain new, informal, subcultural words in which con- conveys a notion of:
    1. constructed, artificial
    2. hypothetical, fictional
    3. related to conlangs, conworlds, etc.

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