dead calm vs uneven

dead calm

adj

  • Completely still with no waves and no wind. 

noun

  • The condition of a perfectly flat sea with no waves and no wind. 

uneven

adj

  • Not even 

  • Not uniform 

  • Varying in quality 

  • Odd 

  • Not level or smooth 

verb

  • To make uneven. 

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