This is the 348th most frequent Chinese word.
个人
"Individual" or "personal."
Here, '个人' functions as 'personally', emphasizing the speaker's individual opinion.
我个人认为这个计划是可行的。
I personally think this plan is feasible.
In this sentence, '个人' serves as an adjective meaning 'personal' to describe his experiences.
他的个人经历非常有趣。
His personal experiences are very interesting.
'个人' here is used both to mean 'individual' and as an adjective 'personal' to stress privacy belonging to a person.