panelist
UK: ˈpænəlɪst | US: ˈpænəlɪst
n. a member of a panel, especially one who participates in a discussion or evaluation.
panelist = panel<group> + ist<one who does>
- panel (from Old French panel, originally "piece of cloth," later extended to mean "list of names" or "group of people")
 - ist (suffix denoting a person associated with a specific action or role, from Latin -ista via Greek -istes)
 
Etymology Origin:
The word panelist combines panel, which evolved from a term for a physical object (cloth) to a metaphorical group of people, with the agentive suffix -ist. This reflects the shift from tangible to abstract, where a panelist is literally "one who belongs to a panel." The suffix -ist is widely used in English to form nouns indicating professionals or participants (e.g., artist, specialist).
The panelist shared insights on climate change during the conference.
She was invited as a panelist to judge the science fair projects.
Each panelist had five minutes to present their viewpoint.
The debate featured four panelists with opposing opinions.
As a seasoned panelist, he often moderates discussions on technology trends.