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for a long time; at (great) length; lengthily; long-windedly; tediously
(extending) far; (stretching) out; (lying down) at full length
永永と続くかに思えた交渉がようやく決着した。
Negotiations that seemed to go on forever finally reached a conclusion.
永永と語り継がれる伝説がこの村に残っている。
A legend passed down through the ages remains in this village.
彼は永永と不満を述べ続けて場を白けさせた。
He went on and on voicing complaints, killing the mood.