依据 (yījù) is a formal noun meaning "basis," "grounds," or "evidence." It is often used in legal, academic, and official contexts to refer to the foundation or justification for a decision, action, or argument.
法院做出判决必须有充分的法律依据。
fǎyuàn zuòchū pànjué bìxū yǒu chōngfèn de fǎlǜ yījù.
A court must have sufficient legal basis to make a ruling.
你说的这些话有什么依据吗?
nǐ shuō de zhèxiē huà yǒu shénme yījù ma?
Do you have any basis for what you're saying?
研究人员正在寻找科学依据来支持这个理论。
yánjiū rényuán zhèngzài xúnzhǎo kēxué yījù lái zhīchí zhège lǐlùn.
Researchers are looking for scientific evidence to support this theory.