preamble
n.
late 14c., from Old French preambule (13c.) and directly from Medieval Latin preambulum, neuter adjective used as a noun, properly "preliminary," from Late Latin praeambulus "walking before," from Latin prae- "before" (see pre-) + ambulare "to walk" (see amble, v.).
〔李〕[pre-;ambl;-e] v.作序言 n.序言 ←alter (L alter)=the other 其它，另一
〔蒋〕[pre-前，ambl=ambul行走;’走在前面”] 序言，前言，前文，绪论