How Is Shiest Spelled?

a superlative of shy¹.

What does Shiest mean?

shy /ʃaɪ/ adj (shyer, shyest, shier, shiest) not at ease in the company of others. easily frightened; timid. (often followed by of) watchful or wary.

What does this spell shy?

adjective, shy·er or shi·er [shahy-er], shy·est or shi·est [shahy-ist]. bashful; retiring. easily frightened away; timid. suspicious, distrustful, or wary (often used in combination): I am a bit shy of that sort of person.