adverb, adjective, verb · emphatic form of the copula verb 是 shì, used to stress identity or existence.

你就是我要找的那个人。

adverb · used to express that something is exactly the case, or to emphasize identity.

他就是我们要找的人。

adverb · exactly; precisely

这个人就是我要找的那位医生。

adverb · only; simply; just

我就是想帮你，没有别的意思。

noun, adverb · used to equate the subject with the complement, emphasizing that the former is exactly the latter; meaning 'is just' or 'is exactly'.

你最好的武器就是耐心。

adverb · an adverbial phrase used to emphasize a state, feeling, or the inevitability of a situation, often expressing frustration or insistence.

你怎么就是不听呢？

adverb · even; even if (often used correlatively with 也 yě)

就是再困难，我们也要坚持下去。

adverb · an emphatic expression used to indicate that the following action is the only purpose or reason, equivalent to 'just' or 'simply'.

我就是想去看看。