gesture, action, or sound that is used to convey information or instructions. Road-side lights that direct traffic to go or stop. To make a noise or motion to tell someone to start.

action or process of investing money. Act of giving time, energy to see a future reward.

To make something easier to do, use or understand.

Job that is performed by members of the military. perform routine maintenance or repair work on.

To refer to or talk or write about something.

cause, explanation, or justification for action or event. Explanations for why some things occurred or was done. To think and make conclusions in a logical manner.

increase or improvement in quality or extent. Improvements that make some things more agreeable.

relating to visual art. Picture or drawing used to show something clearly.

favourable condition/circumstance. Positive points about some things. put in favourable position.

Department in a company in charge of protection.

power or ability. Means, abilities, or potentials to do some things.

example of improving or being improved. Additions or changes that make something better.

Act of proving that something is genuine, not fake.

Process of spreading a substance over a surface.

Design and construction of buildings.