means A feeling of deep respect, awe, or veneration toward someone or something regarded as sacred or worthy of honor.

from From Latin reverentia, "awe, respect," built from revereri — re- (an intensifier here) plus vereri, "to stand in awe of, to fear, to respect." That vereri is the same root that gives us 'revere' itself; the underlying sense is a kind of wary, watchful regard — the way you tread carefully around something you sense is greater than you. It reached English through Old French in the medieval period.