VOCABULARY UNIT 2 LESSON 1 WEEK 1

Achieving maximum productivity with minimum wasted effort.

Produce and discharge (something, especially gas or radiation).

A conducting wire or thread with a high melting point, forming part of an electric bulb heated or made incandescent by an electric current.

A device used to convert electricity into light, consisting of a source of illumination (e.g. an electric filament or one or more LEDs) enclosed within a transparent or translucent shell, typically having a rounded shape and designed to be fitted into a socket in a lamp.

Lighting or light.

A gesture, action, or sound that is used to convey information or instructions, typically by prearrangement between the parties concerned.

The plural of a ray or shaft of light.

Move quickly up, back, or away from a surface after hitting it; rebound (once or repeatedly).

Electromagnetic waves or sound waves lasting only a short length of time.

A warship with a streamlined hull designed to operate completely submerged in the sea for long periods, equipped with a periscope and typically armed with torpedoes or missiles.