IPA: //ˈsteɪʃəˌnɛri//
KK: /ˈsteɪʃəˌnɛri/
Writing materials and supplies used for creating documents, such as paper, pens, and envelopes.
I bought some stationery to write letters to my friends.
Stationery is derived from "station" (from Latin "statio", meaning a standing place) and the suffix "-ery" (indicating a place associated with a specific function). The word "stationery" refers to a place where writing materials are sold or the materials themselves used for writing.
Think of a 'station' as a place where you can find 'writing materials' — that's what stationery means.