plank

plank /ˈplæŋk/ noun
plural planks
plank
/ˈplæŋk/
noun
plural planks
Britannica Dictionary definition of PLANK
[count]
1 
: a long, thick board that is used especially in building something
2 
formal : one of the official beliefs and goals of an organization (such as a political party)
— compare platform

walk the plank

— see 1walk