topsupport
nounUK /ˈtɒp.səˌpɔːt/
US /ˈtɑːp.səˌpɔːrt/
A topsupport is a thing that holds something up from the top.
The topsupport kept the heavy shelf from falling down.
OTHER MEANINGS
2. The highest part of a support structure that carries the main weight.
The engineer checked the topsupport of the bridge for cracks.
3. Help or backup given by a person in charge.
The team leader gave topsupport to the new players.
4. A feature in software that gives extra help to users at the top level.
The app's topsupport answered questions quickly.