Answer:
conceal inner emotions more effectively than words do.
Step-by-step explanation:
The facial expressions , being conscious or unconscious provide more information than we could ever imagine. Sometimes a person can try to hide a real feeling, still the facial expression will eventually uncover the real emotions. So winks, laughs, different kinds of smile, winces, are some of the gestures that often work at an subconscious level.
Psychiatrists have labeled them micro emotions, or micro expressions that revel inner states of being, As emotions they often last a fraction of a second, and yet they are facial movements that tell if the person is sad, angry, anxious, scared, etc.
The facial expressions are so important for communicating that emoticons developed in chats as a means to compensate the lack of this element.