One Word Substitution

Polyandry is the custom of having more than one husband at the same time.

The preposition ‘through’ is a preposition of cause or reason and is correct in this context as it indicates that the luggage was lost due to negligence.

A radius is defined as a straight line from the center of a circle to its circumference. It is half the length of the diameter. The other options - raft (floating logs), rafter (roof beam), rag (cloth), rage (anger) - are unrelated geometric terms. This is basic circle terminology.

A raft is a flat structure made of logs of wood or other materials tied together and used for floating on water. It can be used for transportation, rescue operations, or recreation. Radius is a geometric term, rafter is a roof support beam, rag is a piece of cloth, and rage is an emotion - none describe floating logs.

A rag is a piece of cloth that has become torn or worn out, often used for cleaning or wiping surfaces. The other options - raft (floating platform), radius (bone in forearm/distance from center), rafter (roof beam), and rage (intense anger) - do not relate to worn cloth.

A rafter is one of the sloping wooden beams that form the structural framework of a roof. Note: the question has a typo - 'slopping' should be 'sloping'. The other options do not relate to roof construction.

A rail is a metal bar, typically made of iron or steel, used for various purposes including train tracks, fences, and handrails. The other options - raid (sudden attack), raise (lift up), raisin (dried grape), and rake (gardening tool) - are not iron bars.

To rake means to gather, collect, or draw together, especially leaves or cut grass, using a rake or similar tool. The word can also mean to gather something in a more general sense. The other options do not mean 'to gather'.

A rally is a large public meeting or demonstration held to show support for a particular cause, political party, or movement. The other options - raid (military attack), rail (metal bar/track), raise (lift/increase), and raisin (dried grape) - do not relate to public meetings.

A ram is an adult male sheep. The term is also used for the battering ram used historically in warfare, but in the context of animals, it specifically refers to a male sheep. The other options are unrelated.

A rail is a metal bar, typically made of iron or steel, that forms the track for trains to run on. Rails are laid parallel to each other to guide train wheels. The other options do not relate to train tracks.

Ramification means the process of branching out or developing complex consequences and side effects. It can refer to both physical branching (like tree branches) and abstract outcomes (the ramifications of a decision). The other options do not relate to branching.

To raise means to build up, increase, or accumulate something over time. It can refer to building an army, raising funds, or constructing something. The other options do not convey the meaning of building up.

Rampant means spreading unchecked, flourishing excessively, or high-spirited. When applied to emotions or attitudes, it can mean high-spirited or unrestrained. The other options do not convey this meaning.

A rampage is a period of violent, uncontrolled behavior or storming about violently. The verb 'to rampage' means to move violently and destructively. The other options do not relate to violent behavior.