IPA: /ˈdrɪəriəst/
KK: /ˈdrɪrɪəst/
The most dull, bleak, or depressing; lacking in cheer or excitement.
The weather was the dreariest I had ever experienced, with constant rain and gray skies.
Comparative: drearier
Superlative: dreariest
Dreariest → It is formed from "dreary" (from Middle English *dreary*, meaning gloomy or dismal) and the suffix "-est" (meaning the most). The word "dreariest" means the most gloomy or dismal.
Think of the word 'dreary' which describes something gloomy, and remember that 'dreariest' means the most gloomy.