罢

Source: Make Me a Hanzi.

罢 bà has 罒 wǎng as an old sound part, now not obvious, and 去 as an empty part. Its old sense is tired or exhausted; an early bà meaning was a wild animal, maybe a bear. 'To stop' was borrowed for sound, then grew to 'quit' and 'dismiss'. Read ba, it is a final particle like 吧, also borrowed.