Wherever excluding a hyphen will be very likely to bring about a mispronunciation with the word mainly because "pre" seems not to be a whole syllable (for example, "pre-yaw system", which could be read through as "prey aw course" if unhyphenated). Prefix prepended to imperfective verbs to produce them perfective; https://preownedlv36656.blogocial.com/top-pre-owned-louis-vuitton-secrets-71687458