trans- vs un-

trans-

prefix
  • To or on the other side of, beyond; outside of. 

  • A compound in which two atoms or groups are situated on opposite sides of some plane of symmetry passing through the compound. (Also used without the hyphen as an adjective; see trans.) 

  • Extending across, through, or over. 

  • Transgender or transsexual, or pertaining to those who are transgender or transsexual. 

un-

prefix
  • intensifying a verb that already suggests opposition or removal 

  • do the opposite of, reverse (a specified action) 

  • contrary to or contrasted against traditional norms; unconventional; alternative 

  • Used to form temporary names of elements (such as unbiunium) whose existence has been predicted, and have not yet been given a trivial name. 

  • absent; lacking; not; negative 

  • deprive of, release from, free from, remove from, extract from 

  • not 

  • Used to form large numbers as the first in the sequence. 

How often have the words trans- and un- occurred in a corpus of books? (source: Google Ngram Viewer )