What does it mean to switch the positions of the words before and after?

1. Some words are composed of two words with similar meanings. If you read them backwards, their meanings will remain the same.

Such as: talk-talk, perception-perception, snuggling-snuggling, liking-joy, relaxing-slowing down, accumulation-accumulation, mutual-mutual, substitution-substitution, inquiry-inquiry, swallowing-swallowing, suffering-suffering, neatness-neatness.

2. After the words associated with some contents are reversed, the meanings are still similar or related.

For example: accumulation-accumulation, midnight-midnight, bold-bold, qualitative change-deterioration, opening-liberalization, fireworks-flame, youth-youth, snow-snow, well-well water, infatuation-infatuation, bee-honey, gold-gold.

However, there are still many words which are composed of two words with similar meanings and cannot be used upside down.

Such as: production-production, reality-enlightenment, whole-solar terms, calculation-calculation, physiognomy-physiognomy, official-eunuch, willingness-meeting, drama-volatilization; Some words that are not synonyms can't be reversed casually, such as names-celebrities, getting on the horse-immediately, being in charge-possessing, flirting-emotional appeal, turmoil-walking, getting-getting, human feelings-lovers, rural areas-going to the countryside, stories-accidents, leaders-matchmaking, and Shanghai.

Another interesting phenomenon is that the names of some things, if reversed, just show the purpose of this thing.

For example: sheepfold-sheepfold, bedding-bedding, hammer-hammer iron, door lock-door lock, pot cover-pot cover, bottle stopper-bottle stopper, toothbrush-brushing, bedspread-bedspread, gloves-gloves, masks-covers, insoles-pads, and so on.