The term "more uncertainly" can be expressed in various ways, depending on the context in which it is used. Some possible synonyms include "less confidently," "with greater hesitation," "with more doubt," "in a less decisive manner," "in a more tentative fashion," "with greater ambiguity," or "in a less assured way." Each of these alternatives conveys a slightly different nuance of uncertainty, and can be used to add depth and variety to one's writing or speech. Choosing the right synonym depends on the tone, emphasis, and purpose of the communication, as well as the intended audience and the desired effect.