Above: The Dual NDVI Ultra Probe Unit is powered by a Nano Logger (enhanced by an array of beryllium spheres) and is ready for field action. The TSL2561 is a common luminosity sensor. It measures how bright it is and reports in units that relate to the brightness that people perceive (lux).
An adjective describes (tells us more about) a noun or a pronoun. For example: student is a noun. But we can say more about the student in our sentence by using an adjective: intelligent student; clever student; lazy student; good student... etc. So, here is a sentence: The teacher says Marie is a good student.
Their main function is to qualify the action of the verb in the clause in some way, but they can also be used to add more information to an adjective or other adverb e.g. awfully good, incredibly slowly. The class of adverbs is very wide-ranging in form and is used to add comments to many of the other word classes. noun is a word which is used to denote a person (traffic warden, woman, Prime Minister, pianist etc.), a concrete or abstract entity (binoculars, fork, field, truth, incoherence etc.) or a place (office, garden, railway station).