The phrase "under fear" is typically used to describe a state of being afraid or anxious. There are a number of synonyms that can be used to convey a similar sentiment. For example, one might say that they were "filled with dread," "intimidated," "terrified," or "panicked." Alternatively, one might describe themselves as "nervous," "worried," "uneasy," or "apprehensive." Each of these words suggests a slightly different nuance or level of fear, depending on the context in which they are used. Whether dealing with a minor concern or a major threat, there are many ways to express the feeling of being "under fear".