Merriam-Webster's Dictionary and Thesaurus - Merriam-Webster [470]
Antonyms
nonessential
usually essentials elements, principles, rudiments—more at ELEMENT
est abbreviation 1 established
2 estimate; estimated
EST abbreviation eastern standard time
1-est adjective suffix or adverb suffix — used to form the superlative degree of adjectives and adverbs of one or two syllables 2-est or -st verb suffix — used to form the archaic second person singular of English verbs (with thou) es·tab·lish verb 1 : to institute permanently <~ a law> 2 : to bring into existence : FOUND <~ a settlement>; also : EFFECT 3 : to make firm or stable 4 : to put on a firm basis : SET UP <~ a son in business> 5 : to gain acceptance or recognition of Synonyms [2] constitute, effect, found, inaugurate, initiate, innovate, institute, introduce, launch, pioneer, set up, start—more at FOUND [5] demonstrate, prove, show, substantiate; also attest, authenticate, bear out, document, evidence, support, sustain, uphold; confirm, corroborate, justify, validate, verify Antonyms disprove es·tab·lish·ment noun 1 : something established: as a : a permanent civil or military organization b : a public or private institution 2 : a place of residence or business with its furnishings and staff 3 : an established ruling or controlling group 4 : the act or state of establishing or being established Synonyms [1a, 1b] foundation, institute, institution—more at INSTITUTION [1b] business, company, concern, enterprise, firm, house, outfit—more at ENTERPRISE es·tate noun 1 a : mode or condition of being : STATE b : social standing : STATUS 2 : a social or political class 3 : a person's possessions : FORTUNE 4 : a landed property Synonyms [1a] condition, fettle, form, order, repair, shape, state, trim—more at CONDITION [2] caste, class, folk, order, stratum—more at CLASS [4] castle, hall, manor, mansion, palace, villa—more at MANSION 1esteem noun : high regard Synonyms admiration, appreciation, estimation, favor, regard, respect—more at ADMIRATION 2esteem verb 1 : to view as : REGARD 2 : to set a high value on Synonyms [1] account, call, consider, count, hold, rate, reckon, regard, take—more at CONSIDER [2] admire, appreciate, regard, respect—more at ADMIRE es·ter noun : an often fragrant organic compound formed by the reaction of an acid and an alcohol Esth abbreviation Esther Es·ther noun : a narrative book of canonical Jewish and Christian Scripture esthete, esthetic, esthetically, esthetics variant of AESTHETE, AESTHETIC, AESTHETICALLY, AESTHETICS es·ti·ma·ble adjective : worthy of esteem 1estimate verb -mat·ed; -mat·ing 1 : to give or form an approximation (as of value, size, or cost) 2 : JUDGE, CONCLUDE — es·ti·ma·tor noun Synonyms appraise, assess, evaluate, rate, set, value; also adjudge, deem, judge; ascertain, determine, discover, learn; price, prize; decide, settle; assay, analyze, survey, test; reappraise, reassess, reevaluate, revalue calculate, call, conjecture, figure, gauge, guess, judge, make, place, put, reckon, suppose 2estimate noun 1 : an opinion or judgment of the nature, character, or quality of a person or thing 2 : a rough or approximate calculation 3 : a statement of the cost of work to be done Synonyms [1] appraisal, assessment, estimation, evaluation, judgment—more at ESTIMATION [2] calculation, computation, measurement, reckoning, valuation es·ti·ma·tion noun 1 : a view, judgment, or appraisal formed in the mind about a particular matter : JUDGMENT 2 : the value, amount, or size arrived at in an estimate : ESTIMATE; also : the act of estimating something 3 : high regard : ESTEEM Synonyms [1] appraisal, assessment, estimate, evaluation, judgment, reckoning, valuation—more at ESTIMATE [2] appraisal, assessment, estimate, evaluation, judgment;