Definitions:

• Wiktionary:
  Alternative forms
  • rejoyce
  Etymology
  From Old French resjoir, (Modern French rejouir)
  Verb
  rejoice (third-person singular simple present rejoices, present participle rejoicing, simple past and past participle rejoiced)
  1. (intransitive) To be very happy, be delighted, exult; to feel joy. [from 14th c.]
     • 1748, David Hume, Enquiries concerning the human understanding and concerning the principles of moral, Oxford University Press, 1973, Sec 6: Obscurity, indeed, is painful to the mind as well as to the eye; but to bring light from obscurity, by whatever labour, must needs to be delightful and rejoicing.
  2. (obsolete, transitive) To have (someone) as a lover or spouse; to enjoy sexually. [15th-16th c.]
     • 1485, Sir Thomas Malory, Le Morte Darthur, Book VI: But hit is noysed that ye love Quene Gwenyvere, and that she hath ordeyned by enchauntemente that ye shall never love none other but hir, nother none other damesell ne lady shall rejoyce you [...].
  3. (transitive) To make happy, exhilarate. [from 15th c.]
     • Arbuthnot: Were he [Cain] alive, it would rejoice his soul to see what mischief it had made.
     • 1982, Lawrence Durrell, Constance, Faber & Faber 2004 (Avignon Quintet), p. 790-1: But good news awaited them in the form of permission to travel about the area replenishing medical stocks in hospitals and clinics, and this task was delegated to Constance, as the newcomer, a fact which rejoiced her.
  4. (obsolete) To enjoy.
• Thesaurus.com:
  Synonyms
  exult, revel, celebrate, delight, enjoy, glory, joy, triumph, be glad, be overjoyed, feel happy, jump for joy, make merry.
  Antonyms
  ache, agonize, bemoan, complain, cry, deplore, fret, grieve, lament, moan, regret, sob, wail, weep, yearn, anguish, bewail, bleed, blubber, hurt, keen, languish, miss, pine, repine, rue, sigh, sorrow, suffer, be brokenhearted, carry on, long for, take it hard, wear black, wring hands.

Word: iniquity

Definitions:

• Wiktionary:
  Etymology
  From Middle English iniquite, from Old French iniquite, from Latin iniquitas, from iniquus (“unjust, harmful”).
  Noun
  iniquity (plural iniquities)
  1. Deviation from what is right; wickedness, gross injustice.
     • 1994, Jules, Pulp Fiction, The path of the righteous man is beset on all sides by the iniquities of the selfish and the tyranny of evil men.
  2. A wrongful act.
  3. Absence of moral or spiritual values, lawlessness.
  4. Denial of the sovereignty of God.
• Thesaurus.com:
  Synonyms
  abomination, baseness, crime, evildoing, heinousness, immorality, infamy, injustice, misdeed, offense, sinfulness, unfairness, unrighteousness, wickedness, wrong, wrongdoing, miscreancy.
  Antonyms
  good deed, goodness, kindness, morality, right, virtue, good.