IPA: /ˈɛkspəˌdaɪtər/
KK: /ɛkˈspɛdɪtər/
A person who helps to make a process happen more quickly or efficiently, often by managing the flow of goods or services in a business.
The expediter coordinated the delivery of supplies to ensure everything arrived on time.
Expediter is formed from "ex-" (meaning out) and "pedis" (from Latin "pes", meaning foot). The word originally referred to someone who facilitates or makes a process easier, as if they are helping something move out or forward on foot.
Think of someone helping things move 'out' ('ex-') and 'on foot' ('pedis') — that's why an expediter is someone who facilitates or speeds up a process.