an apparatus carried by a diver, which includes a tank holding compressed, filtered air and a regulator which delivers the air to the diver at ambient pressure which can be used underwater.

To eject or erupt; to remove from membership.

Unclean; covered with or containing unpleasant substances such as dirt or grime.

To pay out (money).

At a higher level, rank or position.

A metal that is a combination of two or more elements, at least one of which is a metal.

to obstruct, cover, or otherwise block (an opening, a portion of an image, etc.).

a pan for frying, generally large and heavy.

to train again; especially, to train or study in a new subject or job

a distance from which sound is still audible.

to notice or view, especially carefully or with attention to detail.

a creature, an animal.

to free from a leash, or as from a leash.

(of a group of organisms, as a species) no longer in existence; having died out.

to surround or hem in; to attack or assail, especially from all sides.

To frighten or deter with a false show of strength or confidence; to give a false impression of strength or temerity in order to intimidate and gain some advantage.

done in a hurry; rushed.

with one’s legs on either side.

A type of very sweet candy or confection, usually made from sugar, butter, and milk or cream.

A subject, now especially of a talk or an artistic piece; a topic.