α. pre-1700 viddeful, pre-1700 viddefull, pre-1700 wid full, pre-1700 widdefow, pre-1700 1800s– widdiefow, pre-1700 1900s– widdifow, 1700s widdiefull, 1700s widdifu, 1700s widdyfou', 1700s widdyfu, 1700s–1800s widdifu', 1700s–1800s widdyfow, 1700s–1800s widdyfu', 1700s–1900s widdiefu', 1800s widdiefoo, 1800s widdifoo, 1800s widdifou, 1800s widdiful Brit. /ˈwɪdᵻfʊl/, U.S. /ˈwɪdəfəl/, Scottish English /ˈwɪdᵻfəl/, 1800s widifu, 1800s withifo' (Orkney), 1900s widdifa (Aberdeenshire), 1900s withifu (Orkney), 1900s– widdiefu.
β. pre-1700 wedefull.
γ. 1800s woodiefu, 1800s woodifu, 1800s woodifu', 1800s wuddiefu', 1900s– woddyfa, 1900s– wuddifu.