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Glite Dictionary
side sill

side sill

9.5
A long metal beam along the side of a train that supports the floor and body
  • noun
  • Specialized
translation icon : viga lateral
  • During restoration, they replaced the old side sills to ensure the safety of the carriage.

Examples

  • A crack was discovered near the side sill, prompting immediate maintenance work.

  • The side sill is crucial for the stability of the train.

  • The engineer inspected the side sill for signs of rust or structural damage.

  • What materials are used for the side sill construction?

  • The mechanic replaced the damaged side sills of the train to ensure its stability.

  • Inspecting the side sills is crucial for maintaining the integrity of the railway vehicle.

  • The side sills provide essential support to the structure of the railway carriage.

Synonyms

solebar
vsside sill
  • UK
9.9

A long beam along the side of a train that supports the body and floor

is an alternative technical name used for the same component

Surface Forms

side sill singular
side sills plural

Morphology

side + sill

The compound combines 'side' (lateral part) with 'sill' (a horizontal structural member), so the meaning — a horizontal/supporting member located along the side of a vehicle — is directly derivable from the constituents. This noun–noun compounding follows ordinary English composition patterns and is cross-linguistically common, so a learner who knows both words should be able to infer the MWE's meaning.

Etymology

Side sill comes from house building: a sill is the long low piece under a door or window, and on a train the same 'bottom' beam runs along the side. That's why side sill means the long beam along the side that 'supports' the vehicle's body and floor.