sincerest is sincere's Superlative

sincere

US [sɪnˈsɪr]
UK [sɪnˈsɪə(r)]
  • adj.真挚的;真诚的;不混杂…的
Comparative Degree:sincerer  Superlative:sincerest  
adj.
1.
真挚的;真诚的
2.
〈古〉纯粹的,不混杂...的 (of)

Sample Sentence

Definition:
Category:AllAll,OralOral,WrittenWritten,TitleTitle,TechnicalTechnical
Source:AllAll,DictionaryDictionary,WebWeb
Difficulty:AllAll,EasyEasy,MiddleMiddle,HardHard