x1 is intense/bright/saturated/brilliant in property (ka) x2 as received/measured by observer x3.
Also lustrous, gleaming, sparkling, shining (all probably better metaphorically combined with gusni: gusycai or camgu'i); in colors, refers principally to increased saturation (with opposite kandi). See also denmi, gusni, kandi, ruble, skari, tilju, tsali, mutce, blabi, blanu, bunre, cicna, crino, grusi, narju, nukni, pelxu, xekri, xunre, zirpu.