IPA: /ˈstʌltɪfaɪɪŋ/
KK: /ˈstʌltɪfaɪɪŋ/
Causing someone to feel dull or unable to think clearly; making someone feel less intelligent or less active.
The stultifying routine of the job made her feel unmotivated and bored.
Stultifying is formed from "stultus" (meaning foolish) and the suffix "-fy" (meaning to make). The word describes the act of making someone or something foolish or ineffective.
Think of the word 'foolish' ('stultus') and remember that 'stultifying' means making something foolish or ineffective.
No commonly confused words.