Причастие прошедшего времени
Dial. / chiefly Scottish & Northern English; used of rivers.
Определения
(intransitive, chiefly British) Of a river: to overflow or flood suddenly, especially after heavy rain. After two days of torrential downpours, the Tweed spated and covered the fields.
(transitive, dialectal) To cause (a river or stream) to overflow its banks. Spring thaws regularly spated the narrow tributaries feeding the main river.