There are several synonyms that one can use for the phrase "bending the knees." Some of the most common include "kneeling," "crouching," "squatting," and "hunching." These phrases all describe the same motion of bending the legs at the knee joint, but each has its own connotations and implications. For example, "kneeling" suggests a more formal and reverent posture, while "squatting" might connote a more casual or practical stance. Similarly, "hunching" implies a more forward-bent posture that might be associated with discomfort or tension, while "crouching" suggests a lower-to-the-ground position that might be associated with sneakiness or hiding.