こそ

'こそ' is a Japanese particle utilized for emphasizing a particular aspect of a sentence. When placed after a noun or a verb, it serves to bring attention to that element, indicating that it is particularly vital or relevant in the context of the statement. This usage can express feelings of certainty or highlight a contrast with other possibilities.

For example, when you say '友達こそ大切だ' (it is friends that are important), it suggests that, among all the things in life, friends are what you are emphasizing as significant. It's important to note that 'こそ' can also be used to express the speaker's conviction or determination. Its emphasis can convey a sense of exclusivity, as if to say 'only this is true or relevant.'

• When used with a verb in the て form, it reinforces the action being discussed.
• 'こそ' is different from other particles like 'は' or 'も'; while 'は' introduces a topic and 'も' adds to it, 'こそ' stresses that the preceding element is the most important or deserving of attention.