kevlu'a lujvo

p1=k1 is a tunnel through obstacle k2, that stretches from p2 to p3 and goes through points p4 (set)

kevna pluta -- Discussed on the IRC on March 31st, 2014, around 21:00 GMT

In notes:

feskevlu'a
x1 is a sewer carrying waste through x2 that stretches from x3 to x4 and goes through points x5 (set)
jackevlu'a
x1 is a culvert under x2 stretches from x3 to x4 and goes through points x5