IPA: /ˈmuːtə/
KK: /ˈmuːtər/
A person who discusses or debates a topic that is uncertain or open to argument.
The mooter presented several compelling arguments during the debate.
The word 'mooter' originates from the verb 'moot' (from Old English 'motian', meaning to discuss or debate) combined with the suffix '-er' (meaning a person who). A 'mooter' is therefore a person who brings up a topic for discussion or debate.
Think of someone who 'discusses' ('moot') a topic — the '-er' indicates that this person is the one doing the mooting.