ETYM Old Eng. barrere, barere, French barričre, from barre bar. Related to Bar.
1. A structure or object that impedes free movement.
2. Any condition that makes it difficult to make progress or to achieve an objective; SYN. roadblock.
3. Anything serving to maintain separation by obstructing vision or access.

1. A continuous horizontal timber forming the lowest member of a framework or supporting structure.
2. (Geology) A flat (usually horizontal) mass of igneous rock between two layers of older sedimentary rock.
Sheet of igneous rock created by the intrusion of magma (molten rock) between layers of pre-existing rock. (A dyke, by contrast, is formed when magma cuts across layers of rock.) An example of a sill in the UK is the Great Whin Sill, which forms the ridge along which Hadrian’s Wall was built.
A sill is usually formed of diabase, a rock that is extremely resistant to erosion and weathering, and often forms ridges in the landscape or cuts across rivers to create waterfalls. + prikaži više

ETYM Old Eng. threswold, threshwold, as. threscwald, therscwald, therscold, threscold, from threscan, therscan, to thresh; akin to Icel. threskjöde, thröskuldr, Swed. tröskel, Dan. taerskel. Related to Thrash.
1. The smallest detectable sensation; SYN. limen.
2. The starting point of a new state or experience.

Sleeping car.

One of the cross braces that support the rails on a railway track; SYN. railroad tie, crosstie, sleeper.
Any of the transverse supports to which railroad rails are fastened to keep them in line