used for emphasis with following adjective functioning as adverb. Thing that is not yet known or named.

For a reason.

differing in size, amount, degree, or nature. To change something and make it different.

type of aircraft which derives both lift and propulsion from one or more sets of horizontally revolving overhead rotors. Aircrafts with spinning blades at the top. transport by helicopter.

person who has changed faith or belief. People switching from one belief system to another. To change form, character, or function to another.

picture or diagram made with pencil, pen. Images made of lines done with a pencil.

Person or device that adds the number of things. Being opposite or against something. To say or do something in opposition or resistance.

Information, understanding, or skill.

buoyant or suspended in water or air. To move slowly and easily through air.

come to end.

Old or out of date and not of much use.

used to emphasize basic, fundamental, or intrinsic nature of person or thing.

in accordance with what is generally done.

Group who take turns performing a certain task.

Participant in experiment that is left untouched. To direct or influence the behavior of something.