のはよそう

let's not

→ の
phrase Rare #33,525
let's not Follows a verb in its dictionary form and expresses a suggestion to refrain from doing something. Often translates as “let's not...” or “we'd better not...”.
JA: 今日は無理をするのはよそう。
EN: Let's not push ourselves today.

議論のために議論をするのはよそう

Let’s not argue just for the sake of arguing.

彼女に話し掛けるのはよそう

Let's not talk to her.

細かいこととやかく言うのはよそう

Let's not quibble over the little things.

君と僕の間での話などするのはよそう

Let's not talk about money between you and me.

— さらば、わが愛/覇王別姫 (1993)

ここに座るのはよそう

Let's not sit here.