Something relatable is easy to connect with because it matches feelings or experiences you already have — you see yourself in it. It's used a lot for characters, stories, or posts online ('this is so relatable') to say 'I feel exactly the same way'. It's a casual, modern word, especially common among younger speakers on social media, and sometimes people use it as a light joke about something everyday and slightly annoying.

有共鳴的、感同身受的