想像もつかない

can't imagine

→ 想像
phrase Rare #31,613
can't imagine A set phrase meaning something is completely beyond one's imagination or difficult to conceive. The も adds emphasis, roughly "even."
JA: こんなに大きな家に住むなんて、想像もつかない。
EN: I can't imagine living in such a big house.

何故彼女がそんなことしたのか想像もつかない

I can’t imagine why she did such a thing.

小さな子供と一緒に眠ることがどれほど幸せなこと想像もつかないでしょう

You can’t imagine how happy it is to sleep with a small child.

— 甘い生活 (1960)

ペットがいない生活なんて想像もつかない

I can’t imagine life without a pet.

あなたには想像もつかないでしょ

You can’t even imagine it, can you?

これ以上素晴らしいものは想像もつかない

I can't imagine anything more wonderful than this.