Squeakingly is an adverb that describes a sound that is made with a high-pitched, sharp, or jarring quality. Some synonyms for squeakingly include shrilly, sharply, piercingly, screechingly, shrill, stridently, gratingly, and creakily. Depending on the context in which squeakingly is used, there may be other synonym options available as well. Regardless of which synonym is chosen, the intent is to convey a sense of discomfort, annoyance, or alarm in response to the sound being described. Ultimately, the choice of synonym will depend on the writer's personal style and the desired effect on the reader.