Synonyms that are in the dictionary are marked in green. Synonyms that are not in the dictionary are marked in red.
Antonyms that are in the dictionary are marked in green. Antonyms that are not in the dictionary are marked in red.
You can bring up the emote wheel by pressing E on your keyboard or Up on the D-pad of a controller, at which point you can select which emote you'd like to perform from a pre-selected group.
Source: https://www.digitaltrends.com/gaming/wo-long-how-to-start-zhongyuan-dlc/