IPA: /dɪsˈkrɛdɪtəbl/
KK: /dɪsˈkrɛdɪtəbl/
Causing harm to someone's reputation or standing; something that is shameful or dishonorable.
His discreditable actions led to his removal from the committee.
Discreditable → It is formed from "dis-" (meaning apart or away) and "creditable" (from Latin "creditus", meaning trusted or believed). The word describes something that is not worthy of trust or belief, hence discreditable.
Think of something that is 'not worthy of trust' — 'dis-' means apart, and 'creditable' relates to being trusted.