SINKBOX

ˈ ̷ ̷ˌ ̷ ̷ noun

or sinkboat ˈ ̷ ̷ˌ ̷ ̷

Etymology: sink (II) + box or boat

: a device used in hunting wild fowl consisting of a raft or broad low float having a rectangular depression in which a hunter may conceal himself — called also battery