ogólnikowo ingilizce:

I vaguely remember him

which is vaguely annoying me

I know vaguely where his house is.

He was still going strong at last call, as I vaguely remember.

its shape was vaguely and disturbingly familiar

I have a vague idea of where the hotel is. He was a bit vague about directions. I vaguely remember (= slightly remember) meeting her.

he vaguely remembered talking to her once

it is vaguely familiar

Someone's niece, Arihnda vaguely remembered, working a two-week internship.

I've heard vaguely about it.

Sounds vaguely familiar.