IPA: /ˈmuːdiəst/
KK: /mudɪst/
This word describes someone who is often in a bad or changing mood, more than anyone else.
She is the moodiest person I know; one moment she is happy, and the next she is upset.
Comparative: moodier
Superlative: moodiest
Moodiest → It is formed from "mood" (from Old English *moda*, meaning state of mind or emotional state) and the suffix "-iest" (meaning most). The word "moodiest" describes someone who is in the most variable or changeable emotional state.
Think of 'mood' as your emotional state, and remember that 'moodiest' means having the most extreme or changeable emotions.