The term "ambitious desire" is often used to describe a strong yearning or determination to achieve something great. There are numerous synonyms for this phrase that can more accurately capture the intensity of this feeling. Some of these include "unyielding aspiration," "unrelenting drive," "unwavering determination," "undaunted pursuit," and "insatiable hunger." Each of these synonyms brings a unique nuance to the meaning of an ambitious desire, but all convey the idea of an unwavering focus on achieving a lofty goal. Whether you prefer one particular phrase or use a combination of these synonyms, they all signify a powerful motivation to succeed in the face of adversity.