If you feel a sense of disquiet, you're worried or anxious about something. Disquiet at the dinner table means that everyone feels upset or on edge.
You can use the word disquiet as a noun or a verb. A feeling of disquiet might fill you as you walk slowly through a truly spooky haunted house. You can also say that a low, frightening sound coming from the room ahead disquiets you. The word dates from the 1500s, a combination of dis, "lack of" or "not" in Latin, and quiet, from the Latin root quietus, "calm, at rest, or free from exertion."