IPA: /dɪˈtrækʃən/
KK: /dɪˈtrækʃən/
The act of reducing someone's reputation or value through negative comments or criticism.
His constant detraction of her work made it difficult for her to feel confident.
Detraction is formed from "de-" (meaning down or away) and "tractio" (from "tractus", meaning pulling or drawing). The word refers to the act of pulling down someone's reputation or character, hence the meaning of detracting from someone.
Think of 'pulling down' ('tractio') someone's reputation 'away' ('de-') — that's why detraction means to take away from someone's good name.