gwacter

== Welsh == === Etymology === From gwag (“empty”) +‎ -ter. === Pronunciation === IPA(key): /ˈɡwaktɛr/ === Noun === gwacter m (plural gwacterau) emptiness void, vacuum Synonym: gwactod === Mutation === === References === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “gwacter”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies