IPA: /dɪsˈsɜːrvɪs/
KK: /dɪsˈsɜrvɪs/
An action that causes harm or injury to someone or something, often by being unhelpful or unkind.
Giving him that advice was a disservice to his career.
Disservice → It is formed from "dis-" (meaning apart or away) and "service" (from Latin "servitium", meaning to serve). The word "disservice" refers to an act that is detrimental or harmful, essentially serving someone poorly or causing them harm instead of help.
Think of 'dis-' meaning apart or away, and 'service' meaning to serve. This helps you remember that a disservice is an act that serves someone poorly or causes them harm.