znajomy
familiar, (kolega) acquaintance
To jest mój stary znajomy.
He is an old friend of mine.
Mam mnóstwo znajomych.
I have a lot of acquaintances.
(Nie) brzmi znajomo?
Does it sound familiar?, (pot.) Does it ring a bell/any bells?, No bells ringing?
dʌz ɪt saʊnd fəˈmɪlɪə?ˌ dʌz ɪt rɪŋ ə bεl/ˈεnɪ bεlz?ˌ nəʊ bεlz ˈrɪŋɪŋ?