"Did you just spill coffee on the carpet?" "Oh no! Sorry." "If sorry fixed everything, we wouldn’t need the police!"
Because the hiragana ends with an う sound, you know this word is a verb. The kanji itself means zero, but the verb vocab version means to spill or to drop. Just imagine something that's spilling and dropping. Eventually it will reach zero.
Imagine a barrel of corn cobs, spilling and dropping out corn cobs, until they reach zero.