drainhole
nounUK /ˈdreɪnhəʊl/
US /ˈdreɪnhoʊl/
A drainhole is a small hole where water can flow out.
The water in the sink went down the drainhole.
OTHER MEANINGS
2. A hole made in a boat or container to let unwanted liquid escape.
They drilled a drainhole in the bottom of the bucket.
3. An opening at the bottom of a sink, tub, or basin for wastewater.
Hair had clogged the drainhole in the bathtub.
4. A small opening in a roof or wall that lets rainwater drain away.
Rainwater poured from the drainhole above the window.