persisting for a long time or constantly recurring.

weaken or damage something

a lack or shortage.

the action of intruding.

prolongation of a sound; resonance.

the action of insulating something.

the provision of fresh air to a room, building

remove a veil or covering from, in particular uncover (a new monument or work of art) as part of a public ceremony.

tending to cause harm.

consist of; be made up of.

confirm or give support to

the state of being exposed to contact with something.

bring (a fact, event, or situation) back into one's mind; remember.

completely remove or get rid of

the central point, pin, or shaft on which a mechanism turns or oscillates.

tend to meet at a point.

say or pronounce clearly.

marked by exactness and accuracy of expression or detail.

having or showing the ability to speak fluently and coherently.

fighting between armed forces.

have a close similarity; match or agree almost exactly.

come near or nearer to (someone or something) in distance or time.

covering or affecting a large area.

the art or practice of designing and constructing buildings.

based on untested ideas or techniques and not yet established or finalized.