n. 25B6; adjective a moot point : DEBATABLE, open to discussion/question, arguable, questionable, at issue, open to doubt, disputable, controversial, contentious, disputed, unresolved, unsettled, up in the air.
25B6; verb the idea was first mooted in the 1930s : RAISE, bring up, broach, mention, put forward, introduce, advance, propose, suggest.