満たす

The core image of this verb is "filling a void" or "reaching a required level," whether that void is a physical container, a set of criteria, or an emotional longing.

In a physical sense, while it means "to fill," it often carries a more formal or literary tone than the everyday verb "ireru" (to put in). It suggests filling something to the brim or completing the volume of a space.

When used for requirements or standards, it is the standard term for "meeting" or "satisfying" a condition. It implies that a specific threshold has been reached or a checklist has been completed.

In an emotional or psychological context, it describes the act of quenching a desire or filling an inner emptiness. It is distinct from "manzoku saseru" (to satisfy/content); while "manzoku saseru" focuses on the state of being satisfied, "mitasu" focuses on the act of providing what was missing to reach a state of fullness.