受 is a key passive marker: 受到 (to receive), 受不了 (cannot bear), 受害 (to be harmed). It combines with many words: 受伤 (get injured), 受骗 (be deceived), 受苦 (suffer hardship).
usage
受不了 is a very common spoken expression meaning 'I can't stand it!' or 'It's unbearable!'
