n. a very poisonous metallic element that has three allotropic forms; arsenic and arsenic compounds are used as herbicides and insecticides and various alloys; found in arsenopyrite and orpiment and realgar

n. a great amount or extent; "they did much for humanity"

adv. to a great degree or extent; "she's much better now"

adv. (degree adverb used before a noun phrase) for all practical purposes but not completely; "much the same thing happened every time"; "practically everything in Hinduism is the manifestation of a god"

adv. "I like her well"

adv. frequently or in great quantities; "I don't drink much"; "I don't travel much"

adj. absolutely essential

adj. unavoidably determined by prior circumstances; "the necessary consequences of one's actions"

adj. with mass nouns; "much traffic"

adj. (used with mass nouns) great in quantity or degree or extent: "not much rain"; "much affection"; "much grain is in storage"

n. (chemistry) the ratio of the total mass of an element in the earth's crust to the total mass of the earth's crust; expressed as a percentage or in parts per million

n. a full supply; "there was plenty of food for everyone"

adj. required by rule; "in most schools physical education is compulsory"; "attendance is mandatory"; "required reading"

adj. required as a prior condition or course of study

adj. existing as an essential constituent or characteristic; "the Ptolemaic system with its built-in concept of periodicity"; "a constitutional inability to tell the truth"

adj. serving as an essential component; "a cardinal rule"; "the central cause of the problem"; "an example that was fundamental to the argument"; "computers are fundamental to modern industrial structure"

adj. constitutional in the structure of something (especially your physical makeup)

adj. relating to verbs in the imperative mood

adj. impossible to avoid or evade:"inescapable conclusion"; "an ineluctable destiny"; "an unavoidable accident"

adj. marked by intense physical force; "a big wind"

adj. a quantifier that can be used with count nouns and is often preceded by `as' or `too' or `so' or `that'; amounting to a large but indefinite number; "many temptations"; "the temptations are many"; "a good many"; "a great many"; "many directions"; "take as many apples as you like"; "too many clouds to see"; "never saw so many people"

adj. (comparative of `much' used with mass nouns) a quantifier meaning greater in size or amount or extent or degree; "more land"; "more support"; "more rain fell"; "more than a gallon"

adj. not necessary

adj. possible but not necessary; left to personal choice

adj. unnecessary and unwarranted; "a strikers' tent camp...was burned with needless loss of life"

adj. not absolutely necessary

adj. (quantifier used with mass nouns) small in quantity or degree; not much or almost none or (with `a') at least some; "little rain fell in May"; "gave it little thought"; "little time is left"; "we still have little money"; "a little hope remained"; "there's slight chance that it will work"; "there's a slight chance it will work"