temerous（adj.）
"heedless, rash, reckless," mid-15c., by analogy of other adjectives, from Latin temere "indiscreetly, rashly, by chance" (see temerity). Also compare temerarious. Other adjectives in the same sense included temerary (early 15c.), temeritous (1892)
该词起源时间：15世纪中期