shliach
Shliach is a Hebrew term meaning emissary, envoy, or messenger. The word comes from the root shin-lamed-chet and denotes a person sent to perform a task on behalf of another. In English, it is often transliterated as shliach, shaliyach, or shliach tzibur in specific contexts.
In Jewish law, the concept of shlichut describes a person authorized to act on behalf of another.
In modern usage, the term is widely used beyond strict halakhic contexts. In particular, the Chabad-Lubavitch
Overall, shliach denotes a person entrusted to act for another, with its strongest associations in Judaism