Why this word is great
PURBLIND — [Adjective] Having impaired vision, especially partial or dim sight, or lacking in discernment or understanding. From Middle English purblind, possibly from pur (an obsolete adverb meaning 'completely, purely', from Old French pur, ultimately from Latin purus, 'pure') + blind, thus originally meaning 'completely blind'. Unlike "myopic," which clinically specifies nearsightedness, or "obtuse," which directly denotes intellectual dullness, purblind is a crepuscular word, dwelling in the half-light where the literal and figurative bleed into one another. It is the world seen through a rain-smeared window at dusk, the futile squint at a faded inscription, the stubborn refusal to see the heartache in a loved one's silence—a dimness of perception that begins in the eyes and seeps, inexorably, into the soul.