In New Testament passages such as Luke 13:27 and Acts 8:32 (among others), the Greek word translated "iniquity" is adikia (Strong #93) which means:
"(1) injustice, of a judge; (2) unrighteousness of heart and life; (3) a deed violating law and justice, an act of unrighteousness."
It doesn't necessarily carry the connotation of "hidden."
Sin
The problem with the bible, and any book, is that it is interpretive. Typically the word iniquity means lawless, immoral, evil or unjust. Some of the words of the bible have also been unknowingly mistranslated, so the word 'iniquity' may not even be the original intended word.
In the King James version the word - iniquities - appears 56 times the word - iniquity - appears 278 times
It is used 13 times in the Today's New International Version translation.
Worker as most often used in the Bible personifies someone in different context. The Bible in some cases would use the phrase "workers of iniquity" personifying those who are unrighteous or wicked. Also the Bible uses the word to directly mean skilled people in the temple, institutions, e.t.c.
Bending and twisting God's laws.
In the King James Version of the Bible, the word discipline occurs once, in Job 36:10. Job 36:10 He openeth also their ear to discipline, and commandeth that they return from iniquity.
A lot. Too much to quote here, In the King James version the word - iniquities - appears 56 times the word - iniquity - appears 278 times
Nothing - the word butterfly is not found in the Bible.
The word pork is not in the Bible.
The word Clarice is not in the Bible.
The word "iniquity" refers to unfair or unjust behavior. Synonyms for the word include "injustice," "wrong," "evil," and "wickedness," amongst a few others.
The word Bible comes from the Greek word "biblio" or "biblos" which mean The Book.