consequent vs subtle

consequent

adj
  • Of or pertaining to consequences. 

  • Following as a result, inference, or natural effect. 

  • Of a stream, having a course determined by the slope it formed on. 

noun
  • An event which follows another. 

  • The second term of a ratio, i.e. the term b in the ratio a:b, the other being the antecedent. 

  • A consequent stream. 

  • The second half of a hypothetical proposition; Q, if the form of the proposition is "If P, then Q." 

subtle

adj
  • Insidious. 

  • Tenuous; rarefied; of low density or thin consistency. 

  • Barely noticeable, not obvious, indistinct. 

  • Cleverly contrived. 

  • Cunning, skillful. 

  • Hard to grasp; not obvious or easily understood. 

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