adverb, noun
year after year; every year; annually
A yojijukugo (four-character compound) used to emphasize repetition over many years, often in literary or formal contexts. Functions adverbially or as a noun.
年々歳々、この祭りは盛大に行われている。
Year after year, this festival is held on a grand scale.
年々歳々の努力が実を結んだ。
Years of effort have borne fruit.