"On bended knee" is a phrase that typically denotes a gesture of humility, submission, or supplication. However, there are plenty of alternative expressions to convey similar sentiments. One might say "submissively," "humbly," "imploringly," "beseechingly," or "pleadingly." Similarly, one could use "kneeling," "prostrating," "bowing," or "crouching" to describe someone's physical posture. These synonyms vary in their specific connotations and are useful for conveying subtle differences in meaning or tone. Alternative expressions can also help to add variety and interest to your writing, keeping your readers engaged and preventing repetition.