Sump (noun)

1. A pit or basin in which liquids collect and are stored.
2. A low place where water accumulates.
3. A pit in the bottom of an engine or machinery used to catch and store liquids.

Origin:

Of uncertain origin, but possibly derived from the middle low german word 'sumpf' meaning 'swamp' or 'marsh'.

Examples:

1. The sump was used to collect rainwater for irrigation.
2. The sump pump helped to remove the water from the basement during the flood.
3. The oil sump in the car needed to be emptied regularly.
4. The sump was filled with oil, which needed to be changed every 5000 miles.
5. The sump in the well was used to store water for drinking.