Retinal artery occlusion occurs when the retinal artery (or one of its branches) becomes blocked. This results in the blood and nutrient supply to the nerve layer of the retina being cut off. This leads to permanent damage and is a common cause of sudden loss of vision in one eye.
Quench is defined as to satisfy or to extinguish. An example of to quench is to have a cold drink when thirsty. An example of to quench is to put out a fire.
Retrenchment is defined as cutting back or a reduction. An example of retrenchment is a company laying off employees to get back within budget. 1  a retrenching; esp., a reduction of expenses.  a rampart or breastwork within the main fortification.