abrupt

a. 突然的、唐突的、陡峭的、不連貫的

學術名詞

陡坡：測量學
急坡：測量學
截形的：植物學
突然的：植物學

英文釋義

marked by sudden changes in subject and sharp transitions
exceedingly sudden and unexpected
dangerously steep
surprisingly and unceremoniously brusque in manner