Preexist

['priːɪɡ'zɪst] or [priɪg'zɪst]

解释:

(verb.) exist beforehand or prior to a certain point in time; 'Did this condition pre-exist?'.

整理:朱莉安娜--From WordNet

解释:

(v. i.) To exist previously; to exist before something else.

校对:帕蒂