ljswave 1. The car began to slow up. The car began to speed up .
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ljswave1. The car began to slow up.2. The car began to slow down I'd like to know what the difference of meaning is.There is absolutely no difference between the two with regard to meaning. The phrasal verb "slow up" is used in certain regions and by certain people, and it is often shown in lists of phrasal verbs, but it makes no sense to me at all, nor to