Pronunciation: [ʌnbˈɑː] (IPA) 
The word "unbar" is spelled with the prefix "un-" meaning "not" and the root word "bar". The IPA phonetic transcription of "unbar" is /ʌnˈbɑː/, with the stressed syllable being "bar". The vowel sound in the unstressed syllable is the schwa sound /ʌ/, which is the most common sound in English. The consonant sound in "b" is a voiced bilabial stop /b/, which is created by closing both lips and releasing them to make a sound.
The verb "unbar" refers to the action of removing or lifting a bar or obstruction from a door, gate, or similar barrier, thereby opening a previously closed passage. It can also imply the act of undoing a bolt, lock, or latch that was securing the entrance, typically to allow access or facilitate movement.
When unbaring something, the intention is to eliminate the obstacle or barrier that was preventing or limiting entry or exit. This action often involves releasing a metal, wooden, or other solid entity that has been placed across an opening to block passage, usually as a security measure or means of control.
In a figurative sense, "unbar" can also be used to describe the process of removing psychological, emotional, or mental barriers that might hinder progress, communication, or understanding. In this sense, the term implies opening oneself up emotionally or intellectually, breaking down walls that have been erected for self-protection, or unblocking channels of thought and expression.
Overall, the verb "unbar" denotes the act of removing a physical or metaphorical obstruction, allowing for entry, passage, or the free flow of ideas and emotions.
To unfasten; to open by removing bolts or bars.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
The word "unbar" can be traced back to the Old English verb "unbǣran" (also spelled "unberan"), which meant "to unfasten, unbolt, or remove a bar or obstruction". It is composed of the prefix "un-" (indicating reversal or removal) and the verb "bǣran" (meaning "to bear, carry, or support"). Over time, this Old English word evolved into the Middle English verb "unbaren" and eventually transformed into the modern form "unbar". The term retains its original sense of removing a bar or obstacle to allow access or entry.
