action of blocking or obstructing person or thing. To stop from going forward or making progress.

Concerning; about. To look at a person or thing in a particular way.

Can see, easily seen or understood.

Existing or happening before the present time.

Being what was wanted or needed. used to greet someone in polite or friendly way. instance or manner of greeting someone. To greet someone who has just arrived.

distance between successive crests of wave.

showing curiosity or concern about something or someone. To make someone want to know about something.

referring to signals/information represented by discrete values of quantity.

piece of mechanical or electronic equipment. To be left to do what you want.

Whether it is raining, sunny, cold etc. outside. wear away something by exposure to atmosphere.

State of being officially or legally authorized. How true or correct something is.

Method or route used for sending or getting things. direct towards end or goal.

To consider options before making a decision.

sentence worded or expressed so as to elicit information. To ask for or try to get information.

To stop something from happening or existing.