The word "据为己有" is formed through a logical sequence of characters: "据" means to seize or occupy, initiating the action; "为" functions as a verb meaning to make or become, linking the seizure to a change in state; "己" refers to oneself, specifying the beneficiary of the action; and "有" means to have or possess, concluding with the resulting state of ownership. Together, these characters construct a phrase that literally depicts the process of taking something and making it one's own.