ground vs knockdown

The bottom of a body of water. 

Basis, foundation, groundwork, legwork. 

Terrain. 

The pit of a theatre. 

A soccer stadium. 

Reason, (epistemic) justification, cause. 

The plain surface upon which the figures of an artistic composition are set. 

A flat surface upon which figures are raised in relief. 

An electrical conductor connected to the earth, or a large conductor whose electrical potential is taken as zero (such as a steel chassis). 

The area on which a battle is fought, particularly as referring to the area occupied by one side or the other. Often, according to the eventualities, "to give ground" or "to gain ground". 

The surface of the Earth, as opposed to the sky or water or underground. 

One of the pieces of wood, flush with the plastering, to which mouldings etc. are attached. 

Background, context, framework, surroundings. 

The net of small meshes upon which the embroidered pattern is applied. 

A composition in which the bass, consisting of a few bars of independent notes, is continually repeated to a varying melody. 

Advantage given or gained in any contest; e.g. in football, chess, debate or academic discourse. 

The area of grass on which a match is played (a cricket field); the entire arena in which it is played; the part of the field behind a batsman's popping crease where he can not be run out (hence to make one's ground). 

The tune on which descants are raised; the plain song. 

Soil, earth. 

A gummy substance spread over the surface of a metal to be etched, to prevent the acid from eating except where an opening is made by the needle. 

To cover with a ground, as a copper plate for etching, or as paper or other materials with a uniform tint as a preparation for ornament. 

To connect (an electrical conductor or device) to a ground. 

To forbid (an aircraft or pilot) to fly. 

To found; to fix or set, as on a foundation, reason, or principle; to furnish a ground for; to fix firmly. 

To run aground; to strike the bottom and remain fixed. 

To place something on the ground. 

To hit a ground ball. Compare fly (verb (regular)) and line (verb). 

To improve or focus the mental or emotional state of. 

To punish, especially a child or teenager, by forcing them to stay at home and/or give up certain privileges. 

To give a basic education in a particular subject; to instruct in elements or first principles. 

The condition of a sailboat being pushed abruptly to horizontal, with the mast parallel to the water surface. 

An act of knocking down or the condition of being knocked down. 

A shelter erected for use as a temporary dressing room. 

A collection of parts required to assemble a product, typically manufactured in one region and exported elsewhere for assembly. 

a short pass played downwards, for example from the head onto someone's feet. 

A genetically modified organism that carries one or more genes in its chromosomes that have been made less active or had their expression reduced. 

The use of a reagent such as an oligonucleotide with sequence complementary to an active gene or its mRNA transcript, to interfere with the expression of said gene. 

An overwhelming blow. 

To be formed into a head by upsetting in fastening. 

reduced in price, originally to a price below which an article would not be sold by the auctioneer 

powerful enough to overwhelm or knock down 

Capable of being taken apart for packing or removal.