IPA: /dɪˈvɔːrsər/
KK: /dɪˈvɔr.sɚ/
A person who is involved in ending a marriage legally.
The divorcer helped the couple finalize their separation.
Divorcer → It is formed from "divorcer" (from Old French, meaning to separate) and "-er" (meaning a person who). A divorcer is a person who separates or ends a marriage.
Think of someone who 'separates' ('divorcer') from a partner — that's why a divorcer is a person who ends a marriage.