Advancing through repeated sharp turns that alternate from side to side.

An area whose soil remains soaked or flooded, supporting reeds along with other moisture-loving plants.

A road's finished hard covering, made from materials such as asphalt or concrete.

Protected against a particular disease by vaccination or the body's own protective response.

Emotional tension caused when effort is repeatedly blocked from reaching its goal.

An orderly change in which people or duties take turns.

Knives, forks, and spoons used at meals, traditionally made from a shiny precious metal.

Aquatic animals such as clams, oysters, and lobsters, protected by hard outer coverings.

A netted melon with fragrant orange flesh and a central seed cavity.

A craftsperson who shapes heated iron on an anvil, making tools, fittings, and other objects.