mastsupport
nounUK /ˈmɑːst.səˈpɔːt/
US /ˈmæst.səˈpɔːrt/
A strong pole or rope that holds up a tall pole on a boat.
The sailor checked the mastsupport before the storm.
OTHER MEANINGS
2. A device that keeps a flagpole standing straight.
They fixed the mastsupport so the flag would fly high.
3. A part that holds up a tall antenna.
The radio tower's mastsupport was made of steel.
4. Any structure that keeps a tall pole from falling.
The tent's mastsupport kept the center pole upright.