in- vs under-

in-

prefix

  • in, into, towards, within. 

  • Used with certain words to reverse their meaning 

  • in, into 

  • Added to adjectives to mean not 

  • Added to nouns to mean lacking or without 

under-

prefix

  • Subordinate to 

  • Behind 

  • Beneath, under 

  • Deficient, below what is correct 

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