x1 is a selskiski-style (noun-adjective) / military-style tanru with x2 modifying x3, giving meaning x4 in usage/instance x5
See tanru. Refers to "selskiski" type tanru: http://mw.lojban.org/papri/selskiski ; may also be used to describe languages where this is the normal style of compound words (e.g. Latin, French, Spanish, Malay). See tanruskiselski, ke'oi, ke'e'u