tenacious vs unsteady

tenacious

adj
  • Unwilling to yield or give up; dogged. 

  • Having a good memory; retentive. 

  • Holding together; cohesive. 

  • Clinging to an object or surface; adhesive. 

unsteady

verb
  • To render unsteady, removing balance. 

adj
  • Inconstant in purpose, or volatile in behavior. 

  • Lacking regularity or uniformity. 

  • Not held firmly in position, physically unstable. 

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