reefwalker
A person who partakes in reefwalking. / A type of thick-soled shoe used for walking on coral and coastal rocks.
A village in South Northamptonshire district, Northamptonshire, England (OS grid ref SP7551).
(mathematics) A point in a convex set which does not lie in any open line segment joining two points in the set. / (mathematics) The maximum or minimum of a function.
Third-person singular simple present indicative form of broaden
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