Soundest Definition
    adjective
  
 Synonyms: 
 - healthiest
 - best
 - fittest
 - wholesomest
 - rightest
 - heartiest
 - hardest
 - sanest
 - severest
 - heaviest
 - profoundest
 - sturdiest
 - surest
 - strongest
 - firmest
 
Antonyms: 
 - flimsiest
 - unhealthiest
 
    verb
  
 (archaic) Second-person singular present simple form of sound.
Wiktionary 
Origin of Soundest
-  
sound + -est
From Wiktionary
 
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