noun
Refers to every single thing without exception; often used in negative or exhaustive contexts.
彼の言うことは事々が間違っている。
Everything he says is wrong.
事々がうまくいかない日もある。
There are days when nothing goes right.
Reduplication of 事 (こと, 'thing') with the repetition mark 々, yielding the meaning 'each and every thing'.