This is the 576th most frequent Ukrainian word.
хочу
"Хочу" means "I want."
The word 'хочу' indicates a desire to perform an action (to drink water in this case).
Я хочу пити воду.
I want to drink water.
The word 'хоче' (3rd person singular of 'хочу') expresses a desire of another person to achieve a goal (finding keys).
Вона хоче знайти свої ключі.
She wants to find her keys.
The word 'хочемо' (1st person plural of 'хочу') reflects the intent or desire of a group to engage in an activity (trying something new).