退屈で

bored; boring and

→ 退屈だ
phrase Uncommon #19,010
bored; boring and 退屈 describes someone as bored or something as boring, depending on the subject. で links the description to what follows, often giving a reason or result.
JA: 今日は退屈で、何もする気がしない。
EN: I'm bored today and don't feel like doing anything.

退屈で死にそう。

I’m bored to death.

大学初日は、退屈で退屈で。

My first day of college was incredibly boring.

あまりに芝居が退屈でプロポーズを思いついたの?

Was the play so boring that you came up with the idea of proposing?

— アバウト・タイム ~愛おしい時間について~ (2013)

とにかく退屈でつまらない話よ

It's just a terribly boring, uninteresting story.

— Брат 2 (2000)

退屈で何もすることがない。

I'm bored and have nothing to do.

私は退屈でかなわない。

I'm unbearably bored.

退屈で死にそうだ。

I'm bored to death.

それを調査するのは退屈で飽き飽きする仕事だ。

Investigating that is tedious and incredibly boring work.

退屈でもないし寂しくもなかった

I wasn't bored, and I wasn't lonely either.

— オールド・ボーイ (2003)

仕事は退屈でつまらないです。

My job is boring and uninteresting.