This is the 7714th most frequent Japanese word.
去ろ
"去ろ" means "to leave" or "to go away."
In this sentence, '去ろう' is the volitional form of the verb '去る', which means 'to leave' or 'to go away', indicating an intention or attempt to leave.
彼は不機嫌そうに去ろうとした。
He tried to leave angrily.
Here, '去った' is the past form of the verb '去る', used to describe an event of 'passing away' or 'departing' that has already occurred.
嵐が去った後、空が晴れた。
After the storm had passed, the sky cleared up.
In this sentence, '去る' represents the act of 'letting go' or 'removing from one's heart', which metaphorically extends the core meaning of 'leaving or departing' to emotional contexts.