When one wants to convey the meaning of completely giving up or forsaking something, there are several synonyms available for the phrase "abandon entirely". One such synonym is "renounce", which emphasizes the act of publicly rejecting or disavowing a belief or practice. Another synonym is "relinquish", which emphasizes the act of voluntarily surrendering something that one possesses. "Desert", on the other hand, emphasizes the act of leaving something behind without any intention of returning. "Abdicate" is another synonym, which specifically refers to relinquishing a position of power or authority. Finally, "discard" emphasizes the act of casting something aside as unwanted or useless.