Pronunciation: [ɒbsˈɪdɪˌɒnə͡l] (IPA) 
Obsidional is a rare word often used to describe something relating to a siege. It is pronounced /ɑbsɪˈdɑɪənəl/ and the spelling of the word may seem odd at first. The "si" in "obsidional" is pronounced as "zi" due to a linguistic phenomenon called intervocalic voicing, where a voiceless consonant (in this case "s") becomes voiced in between two vowels. This results in the pronunciation of "z" instead of "s."
Obsidional is an adjective that refers to something pertaining to a siege or blockage by an enemy force. It is derived from the Latin word "obsidio," meaning "blockade" or "siege." The term is especially used in a military context to describe a situation in which a city, fortress, or territory is surrounded and cut off by enemy forces, thereby prohibiting any supplies or reinforcements from entering or exiting.
Obsidional can also describe the tactics, strategies, or elements related to a siege. For instance, it can refer to the methods employed by the besieging army, such as building and maintaining fortifications, digging trenches, or launching attacks on the besieged area. It can also refer to the conditions experienced by those under siege, including scarcity of food, water, and resources, as well as the general state of isolation and vulnerability.
Outside of military contexts, obsidional can metaphorically describe a situation or feeling of being trapped, isolated, or surrounded, in which one faces significant challenges or obstacles. This can relate to various aspects of life, such as personal relationships, work, or even psychological states. In such cases, obsidional implies a sense of being under pressure or experiencing a prolonged struggle, with limited options for escape or relief.
Pert. to a siege.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
The word "obsidional" can be traced back to the Latin term "obsidiōnālis", which is derived from the word "obsidio", meaning "siege". In ancient Rome, "obsidional" referred to something related to a siege or the act of besieging a city or fortress. It was typically used to describe actions, conditions, or rewards associated with besieged cities, such as the granting of an "obsidional medal" as a military honor. Over time, the term evolved into "obsidionalis" in Medieval Latin and eventually made its way into the English language as "obsidional". In modern usage, it often refers to something pertaining to a siege or a state of siege.
