Underbolster

Part of speech: noun

Definitions

1. A structural element placed beneath a pillar or similar support to strengthen and stabilize it
2. An underlying support component used to reinforce the base of columns or upright structures
3. A supporting piece installed below a vertical post to provide additional strength and steadiness

Etymology: Underbolster is a compound of "under" and "bolster," and the second part carries most of the history. A bolster began as a long cushion or pillow, and its Old English ancestor, "bolster," meant a pillow or cushion for the head or bed. Over time the word moved from bedding to building. By the late Middle Ages it described a pad or padded support, and in carpentry and construction it came to mean a horizontal member that carries a load, such as a beam laid across a post or a support fixed beneath a larger timber. The prefix "under" adds the sense of being beneath, so an underbolster is a support placed under something else to take its weight. The word is a plain English formation built from native parts rather than a borrowing, and it belongs to the technical vocabulary of building and machinery. Its exact date of first use is uncertain, so it is safest to say it is a later compound built on an old word.

Synonyms: insufficiently support, weakly support, partially bolster, inadequately bolster, barely support

Antonyms: overbolster, strongly support, fully bolster, reinforce, strengthen