What is the term for satisfying a desire or appetite fully?

The term that refers to satisfying a desire or appetite fully is "satiate." When you satiate a hunger or thirst, you fulfill that need entirely, leaving little or no further desire for more. This word emphasizes the complete and absolute satisfaction of a craving, highlighting a sense of being gratified.

In contrast, other terms provided definitely hold different meanings. "Squander" implies wasting resources, such as money or time, rather than fulfilling desires. "Sanction" typically refers to official permission or approval, which does not align with the concept of satisfying an appetite. "Solvent" relates to the ability to dissolve substances or being financially stable, which also does not fit with the idea of satiation. Thus, "satiate" is the only term that accurately captures the essence of fully satisfying an appetite or desire.