お
落

と

し

noun

1. dropping, losing.
2. missing item, something one forgot to write down.
3. cleaning, removing, ridding.
4. trap.
5. wooden protrusion from a Japanese door frame that fits a hole in the threshold, acting as a lock when closed.
6. conclusion (of a speech, etc.).
7. metallic bowl used to hold the charcoal in a wooden hibachi.