Countersunk
/ˈkaʊntərsʌŋk/
Definition 1 of 1
Pro Tip 1/3Technical Term
Used in construction or carpentry; might not be understood in everyday conversation. 
Ask the carpenter if the shelf is countersunk to make it look neat.
Pro Tip 2/3Level Surface
Countersunk implies a smooth finish with no protrusions. 
The table’s surface was perfect after the screws were countersunk.
Pro Tip 3/3Specific Tools
Special tools like a countersink drill bit are needed to create this effect. 
You'll need a countersink to make sure the bolt is countersunk correctly.