clear β Something that is clear is easy to understand, see, or hear.
intelligent β having good understanding or a high mental capacity; quick to comprehend, as persons or animals: an intelligent student.
smart β having or showing quick intelligence or ready mental capability: a smart student.
brainy β Someone who is brainy is clever and good at learning.
clever β Someone who is clever is intelligent and able to understand things easily or plan things well.
open β not closed or barred at the time, as a doorway by a door, a window by a sash, or a gateway by a gate: to leave the windows open at night.
scattered β distributed or occurring at widely spaced and usually irregular intervals: scattered villages; scattered showers.
sparse β thinly scattered or distributed: a sparse population.
thin β having relatively little extent from one surface or side to the opposite; not thick: thin ice.
compressed β Compressed air or gas is squeezed into a small space or container and is therefore at a higher pressure than normal. It is used especially as a source of power for machines.
active β Someone who is active moves around a lot or does a lot of things.
bright β A bright colour is strong and noticeable, and not dark.
cognizant β If someone is cognizant of something, they are aware of it or understand it.
exciting β Causing great enthusiasm and eagerness.
fast β moving or able to move, operate, function, or take effect quickly; quick; swift; rapid: a fast horse; a fast pain reliever; a fast thinker.
interesting β engaging or exciting and holding the attention or curiosity: an interesting book.
eventful β Marked by interesting or exciting events.
keen β finely sharpened, as an edge; so shaped as to cut or pierce substances readily: a keen razor.