This is the 2354th most frequent Japanese word.
アレ
"That" or "that thing" (used when the name is forgotten or unknown).
In this sentence, 'アレ' is used as a demonstrative pronoun referring to something distant from both the speaker and the listener.
アレ、見てください。
Look at that.
Here, 'アレ' functions as a demonstrative pronoun indicating a specific thing understood from the context.
アレを使えば問題ありませんよ。
If you use that, there will be no problem.
In this example, 'アレ' is used indirectly to refer to an action that is clear from the context or deliberately left ambiguous.