The word "spillage" is a modern English formation that combines a native Germanic verb with a Romance noun suffix. The core verb "spill" originates from Old English spillan, which carried the strong sense of "to kill or destroy," a meaning that weakened over time to signify the wasteful or accidental loss of substances, particularly liquids. The suffix "-age," borrowed into English via French from Latin -aticum, is prolific in forming nouns that denote the action or result of a process, as seen in "breakage," "storage," and "postage." Therefore, "spillage" logically constructs its meaning as "the result or action of spilling," directly linking the ancient concept of wasteful loss to the contemporary concrete event of accidental overflow or scattering.

Structure: spill (to cause to fall/flow out) + age (noun suffix denoting action/result) spill: From Old English spillan ("to kill, destroy, waste"). Its functional role is the core verb root meaning "to cause (liquid, grains, etc.) to fall or flow out accidentally." age: From Old French -age, from Latin -aticum (neuter suffix forming nouns). Its functional role is a noun-forming suffix indicating an action, its result, or a collective entity.