noun
every word; each word
Refers to every single word, often used in contexts like 'every word he said' or 'each and every word'. Somewhat formal or literary.
彼の言々が心に響いた。
Every word he said resonated with me.
契約書の言々を慎重に確認する。
I carefully check each and every word of the contract.
一言一句 also means 'every single word', but is more common and idiomatic. 言々 is more literary and less frequently used.
Reduplication of 言 (gen, 'word') with the reading げんげん. The exact historical derivation is uncertain, but it follows a common pattern of doubling a kanji to express 'every' or 'each'.