式
shì · HSK 5
type
式 shì = type/kind/style; same character as in 方式 (method) and 形式 (form)
As a measure word, 式 counts kinds or styles of something — e.g. 两式 means two types. Etymology: 工 (work/tool) + 弋 (phonetic), originally meaning a standard or pattern, which extends to type, style, ceremony.
式 — 工 (work) + 弋 (phonetic)
式 is a phono-semantic compound: 工 ('work, craft') gives the meaning of a tool, rule, or method, while 弋 supplies the sound. It originally referred to a standard pattern or model used in craftsmanship, then broadened to mean 'style, form, ceremony, or formula.'