IPA: /dɪsˈkrɛdɪtəbli/
KK: /dɪsˈkrɛdɪtəbli/
In a way that causes loss of respect or reputation.
The politician acted discreditably during the scandal, losing the trust of many voters.
Discreditably → It is formed from "dis-" (meaning apart or away) and "credit" (from Latin "creditum", meaning belief or trust) and "-ably" (meaning in a manner). The word describes an action done in a manner that causes one to lose trust or belief.
Think of 'dis-' meaning 'apart' and 'credit' relating to 'trust' — so discreditably means acting in a way that causes trust to be lost.