multilateral
adj.
also multi-lateral, 1690s, in geometry, "having many sides," from multi- + Latin latus (genitive lateris) "side" (see oblate, n.). Figurative use by 1748. Meaning "pertaining to three or more countries" is from 1802. Related: Multilaterally.
〔李〕[multi-=many 多；lateral a. 边的 →] a. having or involving many sides or nations 多边的；多国参加的
〔李〕[multi-;later;-ala.] a.多边的； 多国参加的 ←later (L latus,lateris)=side 边
〔蒋〕[multi-多，later边] 多边的，涉及多方面的