The word "testingly" means to do something hesitantly or cautiously, usually to see the reaction or response of the person or situation at hand. There are many synonyms for the word "testingly," such as tentatively, experimentally, cautiously, gingerly, warily, prudently, softly, carefully, reservedly, and hesitantly. Each of these words can be used in place of "testingly" to convey a similar meaning and context in a sentence. Whether you are describing a person or an action, these synonyms provide a range of options to use in your writing or communication to convey the intended message.