The word "忍耐" is formed from two characters: "忍", which visually combines "刀" (knife) above "心" (heart) to depict enduring pain or hardship, and "耐", which combines "而" (and/yet) with "寸" (inch) to imply tolerating or withstanding over a measured period. Together, they construct the concept of forbearance or patience through this literal and symbolic composition.