pillowy

the word 'pillowy' is a modern english formation derived from the noun 'pillow'. the noun itself has a long history, tracing back to old english pyle, which was borrowed from latin pulvinus, meaning a cushion or bolster. the adjectival suffix '-y', of old english origin, is productively added to nouns to create descriptive terms. thus, 'pillowy' literally means "having the qualities of a pillow," a straightforward morphological construction that directly conveys its modern sense of softness and comfort.

Structure: pillow (cushion) + y (adjective suffix) pillow (origin: old english pyle, from latin pulvinus; functional role: base noun denoting a soft cushion for the head) + y (origin: old english -ig; functional role: suffix forming adjectives meaning "having the quality of" or "full of").